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{{Short description|None}}In baseball, earned run average (ERA) is a statistic used to evaluate pitchers, calculated as the mean of earned runs given up by a pitcher per nine innings pitched.{{ref label|ERA|a|a}} A pitcher is men by a baserunner who reached base while batting against that pitcher, whether by hit, base on balls or “walk”, or being hit by a pitched ball; an earned run can be charged after the pitcher is relieved if he allows the runner before leaving the game.WEB,mlb.mlb.com/mlb/downloads/y2008/official_rules/10_the_official_scorer.pdf, The Rules of Scoring: Earned Runs and Runs Allowed, Major League Baseball, 114–118, February 17, 2010, Runs scored by players who reach base on errors, passed balls, or catcher interference under special circumstances are treated as unearned runs, and do not count towards the pitcher’s ERA.Major League Baseball recognizes the player in each league{{ref label|League|b|b}} with the lowest earned run average each season.{{ref label|Qualify|c|c}} The first ERA champion in the National League was George Bradley; in the National League’s inaugural 1876 season, Bradley posted a 1.23 ERA for the St. Louis Brown Stockings, allowing 78 earned runs in 573 innings pitched.WEB,www.baseball-reference.com/players/b/bradlge01.shtml, George Bradley Statistics and History, Baseball-Reference.com, February 17, 2010, The American League was established in 1901, and Hall of Fame pitcher Cy Young led that league with a 1.62 ERA for the Boston Americans during the 1901 season.WEB,www.baseball-reference.com/players/y/youngcy01.shtml, Cy Young Statistics and History, Baseball-Reference.com, February 17, 2010, Over the course of his 17-year major league career, Lefty Grove led the American League in ERA nine times, with a career single-season low of 2.06 for the 1931 Philadelphia Athletics.WEB,www.baseball-reference.com/players/g/grovele01.shtml, Lefty Grove Statistics and History, Baseball-Reference.com, February 17, 2010, Roger Clemens has won the second-most ERA titles, capturing six in the American League and one in the National League.WEB,www.baseball-reference.com/players/c/clemero02.shtml, Roger Clemens Statistics and History, Baseball-Reference.com, February 17, 2010, Sandy Koufax led the National League in ERA for five consecutive seasons (1962–1966); Koufax’ five awards are the most won consecutively by any player and are tied for the most awards by a player in the National League with Christy Mathewson and Clayton Kershaw.WEB,www.baseball-reference.com/players/k/koufasa01.shtml, Sandy Koufax Statistics and History, Baseball-Reference.com, February 17, 2010, WEB,www.baseball-reference.com/players/m/mathech01.shtml, Christy Mathewson Statistics and History, Baseball-Reference.com, February 17, 2010, WEB,www.baseball-reference.com/players/k/kershcl01.shtml, Clayton Kershaw Statistics and History, Baseball-Reference.com, October 1, 2017, In the American League, Walter Johnson also won five ERA titles,WEB,www.baseball-reference.com/players/j/johnswa01.shtml, Walter Johnson Statistics and History, Baseball-Reference.com, February 17, 2010, and Pedro Martínez has won a total of five (four American League and one National League) with two different teams.WEB,www.baseball-reference.com/players/m/martipe02.shtml, Pedro Martinez Statistics and History, Baseball-Reference.com, February 17, 2010, The most recent ERA champions are Gerrit Cole in the American League and Blake Snell in the National League.The lowest single-season ERA in league history was posted by Tim Keefe, whose 0.86 ERA in 105 innings pitched for the National League’s Troy Trojans in 1880 led his closest competitor by .52 runs.WEB,www.baseball-reference.com/players/k/keefeti01.shtml, Tim Keefe Statistics and History, Baseball-Reference.com, February 17, 2010, In the American League, Dutch Leonard’s 0.96 ERA is a single-season record.WEB,www.baseball-reference.com/players/l/leonadu01.shtml, Dutch Leonard Statistics and History, Baseball-Reference.com, February 17, 2010, Keefe and Leonard are the only two pitchers ever to allow less than one run per nine innings pitched in a single season. The widest margin of victory for an ERA champion is 1.96 runs, achieved when Martínez’ 1.74 ERA led Clemens’ 3.70 in the American League during the 2000 season. The largest margin of victory in the National League is 1.26 runs—Dazzy Vance’s 2.61 ERA over Carl Hubbell’s 3.87 in 1930. The smallest margin of victory for an ERA champion is .009 runs. Although the statistic is traditionally recorded to two decimal places by most {{nowrap|sources,WEB,www.baseball-reference.com/leaders/earned_run_avg_leagues.shtml, Yearly League Leaders & Records for Earned Run Average, Baseball-Reference.com, February 17, 2010, WEB,www.retrosheet.org/boxesetc/M/X1L_ML.htm, Major League Single Season Leaders, Retrosheet, Inc, February 17, 2010, WEB,mlb.mlb.com/stats/historical/leaders.jsp?c_id=mlb&baseballScope=mlb&statType=2&sortByStat=ERA&timeFrame=3&timeSubFrame2=4, Historical Leaders (ERA in a Single Season), Major League Baseball, February 17, 2010, }} the 1988 American League title was decided by a margin of less than one hundredth of a run when Allan Anderson’s ERA of 2.446 (55 earned runs in {{frac|202|1|3}} innings)WEB,www.baseball-reference.com/players/a/anderal02.shtml, Allan Anderson Statistics and History, Baseball-Reference.com, February 17, 2010, bested Teddy Higuera’s 2.455 mark (62 earned runs in {{frac|227|1|3}} innings).WEB,www.baseball-reference.com/players/h/higuete01.shtml, Teddy Higuera Statistics and History, Baseball-Reference.com, February 17, 2010, Other contests decided by one hundredth or less include Luis Tiant’s 1.91 ERA ahead of Gaylord Perry’s 1.92 in 1972WEB,www.baseball-reference.com/players/t/tiantlu01.shtml, Luis Tiant Statistics and History, Baseball-Reference.com, February 17, 2010, WEB,www.baseball-reference.com/players/p/perryga01.shtml, Gaylord Perry Statistics and History, Baseball-Reference.com, February 17, 2010, and Mark Fidrych (2.34) over Vida Blue (2.35) in 1976.WEB,www.baseball-reference.com/players/f/fidryma01.shtml, Mark Fidrych Statistics and History, Baseball-Reference.com, February 17, 2010, WEB,www.baseball-reference.com/players/b/bluevi01.shtml, Vida Blue Statistics and History, Baseball-Reference.com, February 17, 2010,

Key{| class“wikitable”

! scope=“row“|Year| Links to the corresponding “year in baseball” or “Major League Baseball season” article! scope=“row“|Leader| Player with the lowest earned run average (ERA) in the league! scope=“row“|Runner-up| Player with the second-best ERA in the league! scope=“row“|League| Denoted only for players outside of the modern major leagues! scope=“row“| † | Member of the National Baseball Hall of Fame and Museum

National League

File:Tommy bond baseball.jpg|thumb|right|upright|Tommy Bond won the triple crown in 1877, leading the National League in wins, www.baseball-reference.com/players/b/bondto01.shtml, Tommy Bond Statistics and History, Baseball-Reference.com, February 22, 2010, ">alt=A shoulders-up photograph of a dark-haired man with a thick mustache. He is wearing a dark suit with a dark-patterned tie.File:Christy Mathewson2.jpg|thumb|upright|alt=A dark-haired man wearing a black sweater and crownless baseball cap looks into the camera. His hair hangs down over his right side of his forehead, and he has a slight smirk on his face.File:GC Alexander retouched.jpg|thumb|right|upright|Grover Cleveland Alexander won the National League ERA title four times with two different teams (the Philadelphia Phillies and the alt=A man in a baseball cap and V-neck buttoned sweater looks to the left of the image. His sweater and his hat both display the letter “P” in block type, and he holds a baseball bat over his shoulder with both hands.File:Mordecai Brown 1909 and 1916.JPG|thumb|upright|(Mordecai Brown|Mordecai “Three-Finger” Brown]] led the league in ERA in 1906 and finished second three times.|alt=Two images spliced together: both images feature the same man in a white baseball uniform and dark baseball cap following through after throwing a baseball. The left uniform has a dark collar and strip down the center of the shirt with “CUBS” over the left breast, and the right uniform features a dark pointed and elongated “C” with the silhouette of a bear inside it.)File:AmosRusiecrop.jpg|thumb|right|upright|Amos Rusie led the National League in ERA in 1894 and 1897, and finished second to alt=A seated man in a white baseball cap and white baseball uniform shown from the chest up. He is looking to the left of the image. He has a small mustache, and his jersey reads “NEW YORK” in dark block type, partially obscured by a short tie worn around his neck under the collar of his jersey.File:Sandy Koufax.jpg|thumb|right|upright|alt=A smiling man in a white baseball jersey and dark baseball cap with an interlocked white “LA” on the front.File:Jake Peavy 03.jpg|thumb|upright|www.baseball-reference.com/players/p/peavyja01.shtml, Jake Peavy Statistics and History, Baseball-Reference.com, February 22, 2010, ">alt=A man in a white baseball uniform with navy blue trim and a navy blue baseball cap throws a baseball from a dirt mound in a stadium with his right hand. His uniform reads “Padres” across the chest in navy blue script trimmed with khaki, and his cap features an interlocked “SD” in white block print. He is wearing a black baseball glove on his left hand.File:Johan Santana Mets.jpg|thumb|upright|Johan Santana won the ERA title in his first National League season after eight years with the alt=A man in a white baseball uniform and a blue baseball cap throws a baseball from a dirt mound on a grass field. He is throwing with his left hand, and there is a black baseball glove on his right hand.File:Chris carpenter 10 1 2009 7803.jpg|thumb|right|upright|alt=A man in a gray baseball uniform with red trim and navy baseball cap follows through after throwing a baseball from a dirt mound on a grass field with his right hand. His cap has an interlocked “StL” on the front in red type trimmed with white, and he has a black baseball glove on his left hand.File:Kershaw2012(01).jpg|thumbnail|upright|Clayton KershawClayton Kershaw{| class=“wikitable sortable” style="text-align:center;“! scope=“col” |Year! scope=“col” |Leader! scope=“col” |ERA! scope=“col” |Team! scope=“col” |Runner-up! scope=“col” |ERA! scope=“col” class=“unsortable“|Ref

1876}}		1.23	St. Louis Cardinals	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1877}}	>		Boston Red Caps >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1878}}	â€	1.51	Providence Grays	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1879}}	>		Boston Red Caps >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1880}}	† >		Troy Trojans (MLB team)>Troy Trojans		1.38	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1880-PITCHING-LEADERS.SHTML>TITLE=1880 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1881}}		1.80	Detroit Wolverines	â€	2.13	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1881-PITCHING-LEADERS.SHTML>TITLE=1881 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1882}}		1.95	Chicago White Stockings (1870–89)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1883}}	>		Cleveland Blues (NL)>Cleveland Blues	â€	2.05	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1883-PITCHING-LEADERS.SHTML>TITLE=1883 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1884}}	â€	1.38	Providence Grays		1.55	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1884-PITCHING-LEADERS.SHTML>TITLE=1884 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1885}}	â€	1.58	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1886}}	>		St. Louis Maroons >		1.96	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1886-PITCHING-LEADERS.SHTML>TITLE=1886 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1887}}	>		Philadelphia Phillies >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1888}}	â€	1.74	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1889}}	â€	2.73	Boston Beaneaters		2.96	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1889-PITCHING-LEADERS.SHTML>TITLE=1889 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1890}}		1.95	Cincinnati Reds	â€	2.23	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1890-PITCHING-LEADERS.SHTML>TITLE=1890 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1891}}	>		New York Giants (NL)>New York Giants	â€	2.39	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1891-PITCHING-LEADERS.SHTML>TITLE=1891 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1892}}	â€	1.93	Cleveland Spiders	â€	2.36	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1892-PITCHING-LEADERS.SHTML>TITLE=1892 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1893}}		3.18	St. Louis Browns (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1894}}	â€	2.78	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1895}}		2.45	Washington Senators (1891–99)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1896}}		2.45	Cincinnati Reds	â€	2.83	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1896-PITCHING-LEADERS.SHTML>TITLE=1896 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1897}}	â€	2.54	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1898}}	â€	1.88	Chicago Orphans		2.10	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1898-PITCHING-LEADERS.SHTML>TITLE=1898 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1899}}	â€	2.50	Boston Beaneaters	â€	2.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1899-PITCHING-LEADERS.SHTML>TITLE=1899 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1900}}	â€	2.37	Pittsburgh Pirates		2.41	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1900-PITCHING-LEADERS.SHTML>TITLE=1900 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1901}}		2.18	Pittsburgh Pirates		2.22	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1901-PITCHING-LEADERS.SHTML>TITLE=1901 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1902}}	>		Chicago Orphans >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1903}}		2.06	Pittsburgh Pirates	â€	2.26	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1903-PITCHING-LEADERS.SHTML>TITLE=1903 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1904}}	â€	1.61	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1905}}	â€	1.28	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1906}}	â€	1.04	Chicago Cubs		1.51	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1906-PITCHING-LEADERS.SHTML>TITLE=1906 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1907}}		1.15	Chicago Cubs		1.17	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1907-PITCHING-LEADERS.SHTML>TITLE=1907 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1908}}	â€	1.43	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1909}}	â€	1.14	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1910}}	>		Chicago Cubs >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1911}}	â€	1.99	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1912}}		1.96	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1913}}	â€	2.06	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1914}}		1.72	St. Louis Cardinals	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1915}}	â€	1.22	Philadelphia Phillies		1.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1915-PITCHING-LEADERS.SHTML>TITLE=1915 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1916}}	â€	1.55	Philadelphia Phillies	â€	1.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1916-PITCHING-LEADERS.SHTML>TITLE=1916 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1917}}	>		New York Giants (NL)>New York Giants	â€	1.83	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1917-PITCHING-LEADERS.SHTML>TITLE=1917 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1918}}		1.74	Chicago Cubs		2.00	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1918-PITCHING-LEADERS.SHTML>TITLE=1918 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1919}}	â€	1.72	Chicago Cubs		1.79	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1919-PITCHING-LEADERS.SHTML>TITLE=1919 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1920}}	â€	1.91	Chicago Cubs		2.16	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1920-PITCHING-LEADERS.SHTML>TITLE=1920 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1921}}		2.59	St. Louis Cardinals		2.64	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1921-PITCHING-LEADERS.SHTML>TITLE=1921 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1922}}	>		New York Giants (NL)>New York Giants		3.01	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1922-PITCHING-LEADERS.SHTML>TITLE=1922 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1923}}		1.93	Cincinnati Reds	â€	2.80	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1923-PITCHING-LEADERS.SHTML>TITLE=1923 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1924}}	â€	2.16	Brooklyn Robins		2.69	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1924-PITCHING-LEADERS.SHTML>TITLE=1924 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1925}}		2.63	Cincinnati Reds	â€	2.88	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1925-PITCHING-LEADERS.SHTML>TITLE=1925 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1926}}		2.61	Pittsburgh Pirates		2.82	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1926-PITCHING-LEADERS.SHTML>TITLE=1926 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1927}}		2.47	Pittsburgh Pirates	â€	2.52	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1927-PITCHING-LEADERS.SHTML>TITLE=1927 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1928}}	â€	2.09	Brooklyn Robins		2.47	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1928-PITCHING-LEADERS.SHTML>TITLE=1928 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1929}}	>		New York Giants (NL)>New York Giants	â€	3.13	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1929-PITCHING-LEADERS.SHTML>TITLE=1929 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1930}}	â€	2.61	Brooklyn Robins	â€	3.87	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1930-PITCHING-LEADERS.SHTML>TITLE=1930 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1931}}	>		New York Giants (NL)>New York Giants	â€	2.65	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1931-PITCHING-LEADERS.SHTML>TITLE=1931 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1932}}		2.37	Chicago Cubs	â€	2.50	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1932-PITCHING-LEADERS.SHTML>TITLE=1932 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1933}}	â€	1.66	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1934}}	â€	2.30	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1935}}		2.58	Pittsburgh Pirates		2.70	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1935-PITCHING-LEADERS.SHTML>TITLE=1935 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1936}}	â€	2.31	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1937}}	>		Boston Bees >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1938}}	>		Chicago Cubs >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1939}}		2.29	Cincinnati Reds	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1940}}		2.48	Cincinnati Reds		2.50	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1940-PITCHING-LEADERS.SHTML>TITLE=1940 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1941}}		2.24	Cincinnati Reds		2.34	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1941-PITCHING-LEADERS.SHTML>TITLE=1941 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1942}}		1.78	St. Louis Cardinals		2.13	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1942-PITCHING-LEADERS.SHTML>TITLE=1942 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1943}}		1.90	St. Louis Cardinals		2.30	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1943-PITCHING-LEADERS.SHTML>TITLE=1943 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1944}}		2.38	Cincinnati Reds		2.40	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1944-PITCHING-LEADERS.SHTML>TITLE=1944 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1945}}		2.40	Chicago Cubs		2.46	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1945-PITCHING-LEADERS.SHTML>TITLE=1945 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1946}}		2.10	St. Louis Cardinals		2.21	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1946-PITCHING-LEADERS.SHTML>TITLE=1946 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1947}}	â€	2.33	Boston Braves (baseball)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1948}}		2.24	St. Louis Cardinals	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1949}}		2.50	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1950}}		2.71	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1951}}		2.88	Boston Braves (baseball)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1952}}	â€	2.43	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1953}}	â€	2.10	Milwaukee Braves (1953–65)	>		2.75	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1953-PITCHING-LEADERS.SHTML>TITLE=1953 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1954}}		2.30	New York Giants (NL)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1955}}		2.83	Pittsburgh Pirates		3.20	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1955-PITCHING-LEADERS.SHTML>TITLE=1955 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1956}}		2.70	Milwaukee Braves (1953–65)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1957}}		2.66	Brooklyn Dodgers	â€	2.69	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1957-PITCHING-LEADERS.SHTML>TITLE=1957 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1958}}		2.47	San Francisco Giants	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1959}}	>		San Francisco Giants >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1960}}	>		San Francisco Giants >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1961}}	â€	3.02	Milwaukee Braves (1953–65)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1962}}	â€	2.54	Los Angeles Dodgers	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1963}}	â€	1.88	Los Angeles Dodgers		2.11	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1963-PITCHING-LEADERS.SHTML>TITLE=1963 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1964}}	â€	1.74	Los Angeles Dodgers	â€	2.18	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1964-PITCHING-LEADERS.SHTML>TITLE=1964 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1965}}	â€	2.04	Los Angeles Dodgers	â€	2.13	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1965-PITCHING-LEADERS.SHTML>TITLE=1965 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1966}}	â€	1.73	Los Angeles Dodgers		2.22	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1966-PITCHING-LEADERS.SHTML>TITLE=1966 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1967}}	â€	1.87	Atlanta Braves	â€	2.29	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1967-PITCHING-LEADERS.SHTML>TITLE=1967 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1968}}	â€	1.12	St. Louis Cardinals		1.99	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1968-PITCHING-LEADERS.SHTML>TITLE=1968 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1969}}	â€	2.10	San Francisco Giants	â€	2.17	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1969-PITCHING-LEADERS.SHTML>TITLE=1969 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1970}}	â€	2.82	New York Mets		3.02	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1970-PITCHING-LEADERS.SHTML>TITLE=1970 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1971}}	â€	1.76	New York Mets	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1972}}	â€	1.97	Philadelphia Phillies	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1973}}	â€	2.08	New York Mets	â€	2.42	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1973-PITCHING-LEADERS.SHTML>TITLE=1973 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1974}}		2.28	Atlanta Braves	â€	2.38	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1974-PITCHING-LEADERS.SHTML>TITLE=1974 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1975}}	>		San Diego Padres >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1976}}		2.52	St. Louis Cardinals		2.57	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1976-PITCHING-LEADERS.SHTML>TITLE=1976 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1977}}		2.34	Pittsburgh Pirates	â€	2.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1977-PITCHING-LEADERS.SHTML>TITLE=1977 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1978}}		2.43	New York Mets	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1979}}		2.71	Houston Astros		2.76	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1979-PITCHING-LEADERS.SHTML>TITLE=1979 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1980}}	â€	2.20	Los Angeles Dodgers	â€	2.34	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1980-PITCHING-LEADERS.SHTML>TITLE=1980 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1981}}	â€	1.69	Houston Astros		2.18	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1981-PITCHING-LEADERS.SHTML>TITLE=1981 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1982}}	>		Montreal Expos >		Niekro82	a}}	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1982-PITCHING-LEADERS.SHTML>TITLE=1982 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1983}}		2.25	San Francisco Giants		2.37	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1983-PITCHING-LEADERS.SHTML>TITLE=1983 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1984}}		2.48	Los Angeles Dodgers		2.60	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1984-PITCHING-LEADERS.SHTML>TITLE=1984 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1985}}		1.53	New York Mets	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1986}}	>		Houston Astros >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1987}}	â€	2.76	Houston Astros	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1988}}		2.18	St. Louis Cardinals		2.22	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1988-PITCHING-LEADERS.SHTML>TITLE=1988 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1989}}		2.28	San Francisco Giants		2.31	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1989-PITCHING-LEADERS.SHTML>TITLE=1989 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1990}}		2.21	Houston Astros	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1991}}		2.39	Montreal Expos		2.51	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1991-PITCHING-LEADERS.SHTML>TITLE=1991 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1992}}		2.08	San Francisco Giants		2.16	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1992-PITCHING-LEADERS.SHTML>TITLE=1992 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1993}}	â€	2.36	Atlanta Braves		2.48	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1993-PITCHING-LEADERS.SHTML>TITLE=1993 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1994}}	â€	1.56	Atlanta Braves		2.74	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1994-PITCHING-LEADERS.SHTML>TITLE=1994 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1995}}	â€	1.63	Atlanta Braves		2.54	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1995-PITCHING-LEADERS.SHTML>TITLE=1995 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1996}}	>		Florida Marlins >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1997}}	â€	1.90	Montreal Expos	â€	2.20	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1997-PITCHING-LEADERS.SHTML>TITLE=1997 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1998}}	â€	2.22	Atlanta Braves	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1999}}	â€	2.48	Arizona Diamondbacks		2.68	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/1999-PITCHING-LEADERS.SHTML>TITLE=1999 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2000}}	>		Los Angeles Dodgers >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

2001}}	â€	2.49	Arizona Diamondbacks		2.98	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2001-PITCHING-LEADERS.SHTML>TITLE=2001 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2002}}	â€	2.32	Arizona Diamondbacks	â€	2.62	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2002-PITCHING-LEADERS.SHTML>TITLE=2002 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2003}}		2.34	San Francisco Giants	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

2004}}		2.27	San Diego Padres	â€	2.60	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2004-PITCHING-LEADERS.SHTML>TITLE=2004 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2005}}		1.87	Houston Astros		2.39	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2005-PITCHING-LEADERS.SHTML>TITLE=2005 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2006}}		2.98	Houston Astros		3.09	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2006-PITCHING-LEADERS.SHTML>TITLE=2006 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2007}}		2.54	San Diego Padres		3.01	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2007-PITCHING-LEADERS.SHTML>TITLE=2007 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2008}}		2.53	New York Mets		2.62	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2008-PITCHING-LEADERS.SHTML>TITLE=2008 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2009}}		2.24	St. Louis Cardinals		2.48	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2009-PITCHING-LEADERS.SHTML>TITLE=2009 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2010}}	>		Florida Marlins >				WORK=BASEBALL-REFERENCE.COM, October 7, 2010,

2011}}		2.28	Los Angeles Dodgers	â€	2.35	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2011-PITCHING-LEADERS.SHTML>TITLE=2011 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 29, 2011,

2012}}		2.53	Los Angeles Dodgers		2.73	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2012-PITCHING-LEADERS.SHTML>TITLE=2012 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 4, 2012,

2013}}		1.83	Los Angeles Dodgers	>			WORK=BASEBALL-REFERENCE.COM, September 30, 2013,

2014}}		1.77	Los Angeles Dodgers		2.25	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2014-PITCHING-LEADERS.SHTML>TITLE=2014 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 24, 2014,

2015}}		1.66	Los Angeles Dodgers		1.77	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2015-PITCHING-LEADERS.SHTML>TITLE=2015 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 5, 2015,

2016}}		2.13	Chicago Cubs		2.44	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2016-PITCHING-LEADERS.SHTML>TITLE=2016 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 2, 2016,

2017}}		2.31	Los Angeles Dodgers		2.51	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2017-PITCHING-LEADERS.SHTML>TITLE=2017 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 1, 2017,

2018}}		1.70	New York Mets		2.37	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2018-PITCHING-LEADERS.SHTML>TITLE=2018 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 29, 2019,

2019}}		2.32	Los Angeles Dodgers		2.43	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2019-PITCHING-LEADERS.SHTML>TITLE=2019 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 29, 2019,

2020}}		1.73	Cincinnati Reds		2.01	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2020-PITCHING-LEADERS.SHTML>TITLE=2020 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 27, 2020,

2021}}		2.43	Milwaukee Brewers		2.46	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2021-PITCHING-LEADERS.SHTML>TITLE=2021 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 3, 2021,

2022}}		2.16	Los Angeles Dodgers		2.28	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2022-PITCHING-LEADERS.SHTML>TITLE=2022 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 5, 2022,

2023}}		2.25	San Diego Padres		2.98	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/NL/2023-PITCHING-LEADERS.SHTML>TITLE=2023 NATIONAL LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 1, 2023,

Notes

• {{note label|Niekro82|a|a}} While Baseball-Reference.com lists both Niekro and Joaquín Andújar with an ERA of 2.47 in 1982, Niekro’s average is lower (2.467) than Andújar’s (2.473) if extended to three decimal places.

American League

File:Addie Joss 1910.jpg|thumb|right|upright|Addie Joss led the alt=A man with a lazy right eye is shown from the shoulders up. He is wearing a dark baseball cap on his head with a “C” on the front. His mouth is slightly open showing dirty teeth.File:Walter Johnson 1924.jpg|thumb|right|upright|In addition to leading the American League in ERA five times in his career and winning three triple crowns,JOURNAL, July 1998, The Fans Speak Out, Baseball Digest, Lakeside, 57, 7, 8, 0005-609X,books.google.com/books?id=ui0DAAAAMBAJ&q=walter+johnson+triple+crown+hall+of+fame&pg=PA8, {{dead link|date=October 2017 |bot=InternetArchiveBot |fix-attempted=yes }} Walter Johnson was one of the five charter alt=A shoulders-up picture of a smiling man in a white baseball uniform. He is wearing a dark-colored baseball cap on his head with a white block “W” on the front.File:Joe Wood 1915.jpg|thumb|right|upright|“Smoky” Joe Wood“Smoky” Joe WoodFile:Babe Ruth pitching.jpg|thumb|right|upright|Babe Ruth led the league in ERA in 1916; he began his Major League Baseball career as a pitcher with the www.baseball-reference.com/players/r/ruthba01.shtml#standard_fielding, Babe Ruth Statistics and History, Baseball-Reference.com, February 22, 2010, ">alt=A man in a white baseball uniform and white baseball cap follows through after throwing a baseball on a grass field.File:062707 267 Roger Clemens.jpg|thumb|right|upright|Roger Clemens’ seven ERA championships are the second-most by any player in Major League Baseball history, behind alt=A man in a gray baseball uniform and navy blue baseball cap catches a baseball with his bare right hand. His jersey reads “NEW YORK” across the chest in navy blue letters, while his cap sports a white interlocked “NY”.His face is heavily stubbled, and he wears a blue baseball glove on his left hand.File:Pedro’s return.jpg|thumb|right|upright|alt=A man with dark curly hair stands on a grass field. He is wearing a white baseball jersey with “RED SOX” across the chest in red type.File:John Lackey 2006.jpg|thumb|upright|alt=A man in a white baseball uniform with red trim throws a baseball from a dirt mound on a grass field. Under his jersey, he is wearing a long-sleeved red shirt with the sleeves pushed up to his elbows. He wears a black baseball glove on his right hand and a red baseball cap on his head.File:Cliff Lee Follows Through.jpg|thumb|upright|Cliff Lee won the www.baseball-reference.com/awards/mvp_cya.shtml, Most Valuable Player MVP Awards & Cy Young Awards Winners, Baseball-Reference.com, February 22, 2010, in addition to the ERA title.">alt=A man in a gray baseball uniform and navy-blue cap follows through after throwing a baseball. He is standing with his right leg planted on a dirt mound within a grass field and his left leg raised in the air behind him.File:Zack Greinke on July 29, 2009.jpg|thumb|upright|Zack Greinke, pitching for the alt=A man in a gray baseball uniform and a blue baseball cap throws a baseball with his right hand. His jersey reads “Kansas City” across the chest in blue script, and “23” underneath in block print. He is wearing a black baseball glove on his left hand, and the blue sleeves of his long undershirt hang down over parts of his forearms.File:Justin Verlander 2018 (cropped).jpg|thumb|upright|At 39 years old in 2022, Justin Verlander pitched to a 1.75 ERA after missing the previous season while recovering from Tommy John surgeryTommy John surgery{| class=“wikitable sortable” style="text-align:center;“! scope=“col” |Year! scope=“col” |Leader! scope=“col” |ERA! scope=“col” |Team! scope=“col” |Runner-up! scope=“col” |ERA! scope=“col” class=“unsortable“|Ref

1901}}	â€	1.62	Boston Americans		2.42	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1901-PITCHING-LEADERS.SHTML>TITLE=1901 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1902}}		1.91	Detroit Tigers	â€	2.05	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1902-PITCHING-LEADERS.SHTML>TITLE=1902 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1903}}		1.74	Cleveland Naps	â€	2.08	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1903-PITCHING-LEADERS.SHTML>TITLE=1903 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1904}}	â€	1.59	Cleveland Naps	â€	1.62	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1904-PITCHING-LEADERS.SHTML>TITLE=1904 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1905}}	â€	1.48	Philadelphia Athletics		1.76	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1905-PITCHING-LEADERS.SHTML>TITLE=1905 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1906}}		1.52	Chicago White Sox		1.59	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1906-PITCHING-LEADERS.SHTML>TITLE=1906 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1907}}	â€	1.60	Chicago White Sox		1.78	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1907-PITCHING-LEADERS.SHTML>TITLE=1907 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1908}}	â€	1.16	Cleveland Naps	â€	1.26	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1908-PITCHING-LEADERS.SHTML>TITLE=1908 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1909}}		1.39	Philadelphia Athletics	â€	1.41	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1909-PITCHING-LEADERS.SHTML>TITLE=1909 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1910}}	â€	1.27	Chicago White Sox		1.30	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1910-PITCHING-LEADERS.SHTML>TITLE=1910 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1911}}		1.80	Cleveland Naps	â€	1.90	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1911-PITCHING-LEADERS.SHTML>TITLE=1911 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1912}}	â€	1.39	Washington Senators (1901–60)	>		1.91	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1912-PITCHING-LEADERS.SHTML>TITLE=1912 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1913}}	â€	1.14	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1914}}		0.96	Boston Red Sox		1.70	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1914-PITCHING-LEADERS.SHTML>TITLE=1914 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1915}}	>		Boston Red Sox >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1916}}	â€	1.75	Boston Red Sox		1.78	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1916-PITCHING-LEADERS.SHTML>TITLE=1916 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1917}}		1.53	Chicago White Sox		1.74	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1917-PITCHING-LEADERS.SHTML>TITLE=1917 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1918}}	â€	1.27	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1919}}	â€	1.49	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1920}}		2.45	New York Yankees	â€	2.49	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1920-PITCHING-LEADERS.SHTML>TITLE=1920 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1921}}	â€	2.48	Chicago White Sox		3.00	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1921-PITCHING-LEADERS.SHTML>TITLE=1921 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1922}}	â€	2.81	Chicago White Sox		2.85	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1922-PITCHING-LEADERS.SHTML>TITLE=1922 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1923}}	â€	2.76	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1924}}	â€	2.72	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1925}}	â€	2.84	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1926}}	â€	2.51	Philadelphia Athletics		2.83	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1926-PITCHING-LEADERS.SHTML>TITLE=1926 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1927}}		2.28	New York Yankees	â€	2.63	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1927-PITCHING-LEADERS.SHTML>TITLE=1927 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1928}}		2.51	Washington Senators (1901–60)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1929}}	â€	2.81	Philadelphia Athletics		3.06	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1929-PITCHING-LEADERS.SHTML>TITLE=1929 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1930}}	â€	2.54	Philadelphia Athletics		3.31	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1930-PITCHING-LEADERS.SHTML>TITLE=1930 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1931}}	â€	2.06	Philadelphia Athletics	â€	2.67	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1931-PITCHING-LEADERS.SHTML>TITLE=1931 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1932}}	â€	2.84	Philadelphia Athletics	â€	3.09	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1932-PITCHING-LEADERS.SHTML>TITLE=1932 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1933}}		2.95	Cleveland Indians		3.09	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1933-PITCHING-LEADERS.SHTML>TITLE=1933 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1934}}	â€	2.33	New York Yankees		2.61	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1934-PITCHING-LEADERS.SHTML>TITLE=1934 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1935}}	â€	2.70	Boston Red Sox	â€	3.02	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1935-PITCHING-LEADERS.SHTML>TITLE=1935 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1936}}	â€	2.81	Boston Red Sox	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1937}}	â€	2.33	New York Yankees		2.40	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1937-PITCHING-LEADERS.SHTML>TITLE=1937 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1938}}	â€	3.08	Boston Red Sox	â€	3.31	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1938-PITCHING-LEADERS.SHTML>TITLE=1938 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1939}}	â€	2.54	Boston Red Sox	â€	2.76	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1939-PITCHING-LEADERS.SHTML>TITLE=1939 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1940}}	â€	2.61	Cleveland Indians		2.83	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1940-PITCHING-LEADERS.SHTML>TITLE=1940 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1941}}		2.37	Chicago White Sox		2.97	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1941-PITCHING-LEADERS.SHTML>TITLE=1941 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1942}}	â€	2.10	Chicago White Sox		2.27	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1942-PITCHING-LEADERS.SHTML>TITLE=1942 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1943}}		1.64	New York Yankees		2.27	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1943-PITCHING-LEADERS.SHTML>TITLE=1943 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1944}}		2.12	Detroit Tigers	â€	2.22	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1944-PITCHING-LEADERS.SHTML>TITLE=1944 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1945}}	â€	1.81	Detroit Tigers		2.02	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1945-PITCHING-LEADERS.SHTML>TITLE=1945 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1946}}	â€	1.94	Detroit Tigers		2.10	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1946-PITCHING-LEADERS.SHTML>TITLE=1946 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1947}}	>		Chicago White Sox >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1948}}		2.43	Cleveland Indians		2.82{{ref label	a			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1949}}	>		Cleveland Indians >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1950}}	â€	3.20	Cleveland Indians		3.39	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1950-PITCHING-LEADERS.SHTML>TITLE=1950 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1951}}		2.78	Chicago White SoxDetroit Tigers		2.91	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1951-PITCHING-LEADERS.SHTML>TITLE=1951 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1952}}		2.06	New York Yankees	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1953}}		2.42	New York Yankees		2.72	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1953-PITCHING-LEADERS.SHTML>TITLE=1953 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1954}}	>		Cleveland Indians >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1955}}		1.97	Chicago White Sox	â€	2.63	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1955-PITCHING-LEADERS.SHTML>TITLE=1955 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1956}}	â€	2.47	New York Yankees		2.53	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1956-PITCHING-LEADERS.SHTML>TITLE=1956 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1957}}		2.45	New York Yankees		2.54	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1957-PITCHING-LEADERS.SHTML>TITLE=1957 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1958}}	â€	2.01	New York Yankees		2.68	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1958-PITCHING-LEADERS.SHTML>TITLE=1958 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1959}}	â€	2.19	Baltimore Orioles		2.64	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1959-PITCHING-LEADERS.SHTML>TITLE=1959 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1960}}	>		Chicago White Sox >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1961}}		2.40	Washington Senators (1961–71)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1962}}		2.21	Detroit Tigers	† >			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1963}}	>		Chicago White Sox >		2.39	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1963-PITCHING-LEADERS.SHTML>TITLE=1963 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1964}}		1.65	Los Angeles Angels		1.88	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1964-PITCHING-LEADERS.SHTML>TITLE=1964 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1965}}		2.18	Cleveland Indians	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1966}}	>		Chicago White Sox >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1967}}		2.06	Chicago White Sox	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1968}}		1.60	Cleveland Indians		1.81	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1968-PITCHING-LEADERS.SHTML>TITLE=1968 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1969}}		2.19	Washington Senators (1961–71)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1970}}		2.56	Oakland Athletics	â€	2.71	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1970-PITCHING-LEADERS.SHTML>TITLE=1970 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1971}}		1.82	Oakland Athletics		1.91	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1971-PITCHING-LEADERS.SHTML>TITLE=1971 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1972}}		1.91	Boston Red Sox	â€	1.92	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1972-PITCHING-LEADERS.SHTML>TITLE=1972 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1973}}	â€	2.40	Baltimore Orioles	â€	2.52	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1973-PITCHING-LEADERS.SHTML>TITLE=1973 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1974}}	â€	2.49	Oakland Athletics	â€	2.51	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1974-PITCHING-LEADERS.SHTML>TITLE=1974 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1975}}	â€	2.09	Baltimore Orioles	â€	2.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1975-PITCHING-LEADERS.SHTML>TITLE=1975 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1976}}		2.34	Detroit Tigers		2.35	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1976-PITCHING-LEADERS.SHTML>TITLE=1976 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1977}}		2.54	California Angels	â€	2.72	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1977-PITCHING-LEADERS.SHTML>TITLE=1977 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1978}}		1.74	New York Yankees		2.27	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1978-PITCHING-LEADERS.SHTML>TITLE=1978 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1979}}		2.78	New York Yankees		2.96	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1979-PITCHING-LEADERS.SHTML>TITLE=1979 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1980}}		2.46	New York Yankees	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1981}}		2.32 {{ref label	d		Baltimore Orioles >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1982}}		2.96	Cleveland Indians	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1983}}		2.42	Texas Rangers (baseball)	>				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1984}}		2.79	Baltimore Orioles		2.83	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1984-PITCHING-LEADERS.SHTML>TITLE=1984 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1985}}		2.48	Toronto Blue Jays		2.69	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1985-PITCHING-LEADERS.SHTML>TITLE=1985 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1986}}		2.48	Boston Red Sox		2.79	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1986-PITCHING-LEADERS.SHTML>TITLE=1986 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1987}}		2.76	Toronto Blue Jays		2.90	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1987-PITCHING-LEADERS.SHTML>TITLE=1987 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1988}}	>	Anderson88	b}}	Minnesota Twins		2.45{{ref label	c			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1989}}		2.16	Kansas City Royals		2.57	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1989-PITCHING-LEADERS.SHTML>TITLE=1989 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1990}}		1.93	Boston Red Sox		2.40	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1990-PITCHING-LEADERS.SHTML>TITLE=1990 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1991}}		2.62	Boston Red Sox		2.65	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1991-PITCHING-LEADERS.SHTML>TITLE=1991 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1992}}		2.41	Boston Red Sox		2.46	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1992-PITCHING-LEADERS.SHTML>TITLE=1992 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1993}}		2.56	Kansas City Royals		2.95	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1993-PITCHING-LEADERS.SHTML>TITLE=1993 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1994}}	>		Oakland Athletics >				WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

1995}}	â€	2.48	Seattle Mariners		2.95	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1995-PITCHING-LEADERS.SHTML>TITLE=1995 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1996}}		2.93	Toronto Blue Jays		3.22	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1996-PITCHING-LEADERS.SHTML>TITLE=1996 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1997}}		2.05	Toronto Blue Jays	â€	2.28	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1997-PITCHING-LEADERS.SHTML>TITLE=1997 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1998}}		2.65	Toronto Blue Jays	â€	2.89	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1998-PITCHING-LEADERS.SHTML>TITLE=1998 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

1999}}	â€	2.07	Boston Red Sox		3.44	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/1999-PITCHING-LEADERS.SHTML>TITLE=1999 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2000}}	â€	1.74	Boston Red Sox		3.70	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2000-PITCHING-LEADERS.SHTML>TITLE=2000 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2001}}		3.05	Seattle Mariners	â€	3.15	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2001-PITCHING-LEADERS.SHTML>TITLE=2001 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2002}}	â€	2.26	Boston Red Sox		2.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2002-PITCHING-LEADERS.SHTML>TITLE=2002 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2003}}	â€	2.22	Boston Red Sox		2.70	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2003-PITCHING-LEADERS.SHTML>TITLE=2003 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2004}}		2.61	Minnesota Twins		3.26	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2004-PITCHING-LEADERS.SHTML>TITLE=2004 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2005}}		2.86	Cleveland Indians		2.87	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2005-PITCHING-LEADERS.SHTML>TITLE=2005 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2006}}		2.77	Minnesota Twins	â€	3.19	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2006-PITCHING-LEADERS.SHTML>TITLE=2006 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2007}}		3.01	Los Angeles Angels of Anaheim	>			WORK=BASEBALL-REFERENCE.COM, January 31, 2010,

2008}}		2.54	Cleveland Indians	â€	2.78	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2008-PITCHING-LEADERS.SHTML>TITLE=2008 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2009}}		2.16	Kansas City Royals		2.49	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2009-PITCHING-LEADERS.SHTML>TITLE=2009 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=JANUARY 31, 2010,

2010}}		2.27	Seattle Mariners		2.33	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2010-PITCHING-LEADERS.SHTML>TITLE=2010 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 7, 2010,

2011}}		2.40	Detroit Tigers		2.41	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2011-PITCHING-LEADERS.SHTML>TITLE=2011 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 29, 2011,

2012}}	>		Tampa Bay Rays >				WORK=BASEBALL-REFERENCE.COM, October 4, 2012,

2013}}		2.57	Detroit Tigers		2.65	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2013-PITCHING-LEADERS.SHTML>TITLE=2013 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=SEPTEMBER 30, 2013,

2014}}		2.14	Seattle Mariners		2.17	HTTP://BASEBALL-REFERENCE.COM/LEAGUES/AL/2014-PITCHING-LEADERS.SHTML>TITLE=2014 AMERICAN LEAGUE PITCHING LEADERS	PUBLISHER=SPORTS REFERENCE LLC, September 28, 2014,

2015}}	>		Detroit TigersToronto Blue Jays >				WORK=BASEBALL-REFERENCE.COM	ACCESS-DATE=OCTOBER 5, 2015,

2016}}	>		Toronto Blue Jays >				WORK=BASEBALL-REFERENCE.COM	ACCESS-DATE=OCTOBER 2, 2016,

2017}}		2.25	Cleveland Indians		2.90	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2017-PITCHING-LEADERS.SHTML>TITLE=2017 AMERICAN LEAGUE PITCHING LEADERS	PUBLISHER=SPORTS REFERENCE LLC, October 1, 2017,

2018}}		1.89	Tampa Bay Rays		2.21	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2018-PITCHING-LEADERS.SHTML>TITLE=2018 AMERICAN LEAGUE PITCHING LEADERS	PUBLISHER=SPORTS REFERENCE LLC, September 30, 2018,

2019}}		2.50	Houston Astros		2.58	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2019-PITCHING-LEADERS.SHTML>TITLE=2019 AMERICAN LEAGUE PITCHING LEADERS	PUBLISHER=SPORTS REFERENCE LLC, September 29, 2019,

2020}}		1.63	Cleveland Indians		1.99	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2020-PITCHING-LEADERS.SHTML>TITLE=2020 AMERICAN LEAGUE PITCHING LEADERS	PUBLISHER=SPORTS REFERENCE LLC, September 27, 2020,

2021}}	>		Toronto Blue Jays >				WORK=BASEBALL-REFERENCE.COM, October 3, 2021,

2022}}		1.75	Houston Astros		2.20	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2022-PITCHING-LEADERS.SHTML>TITLE=2022 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 5, 2022,

2023}}		2.63	New York Yankees		2.79	HTTPS://WWW.BASEBALL-REFERENCE.COM/LEAGUES/AL/2023-PITCHING-LEADERS.SHTML>TITLE=2023 AMERICAN LEAGUE PITCHING LEADERS	ACCESS-DATE=OCTOBER 1, 2023,

Notes

• {{note label|Scarborough48|a|a}} While Baseball-Reference.com lists both Scarborough and Hall of Famer Bob Lemon with an ERA of 2.82 in 1948, Scarborough’s average is lower (2.817) than Lemon’s (2.820) if extended to three decimal places.
• {{note label|Anderson88|b|b}}{{note label|Higuera88|c|c}} While Baseball-Reference lists both Anderson and Higuera with an ERA of 2.45 in 1988, Anderson’s average is lower (2.446) than Higuera’s (2.455) if extended to three decimal places.
• {{note label|McCatty81|d|d}} Until 1981, the rules stated that the number of innings pitched should be rounded to the nearest whole inning. This explains why McCatty was, at the time, awarded the 1981 ERA title although his ERA appears to be slightly higher than that of Stewart.WEB,sabr.org/research/choosing-among-winners-1981-al-era-title, Choosing Among Winners of the 1981 AL ERA Title – Society for American Baseball Research,

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Footnotes

{{sabermetric | formula = mathrm{ERA} = 9 cdot frac{mathrm{Earned~runs~allowed}}{mathrm{Innings~pitched}}}}

• {{note label|ERA|a|a}} This is shown in the mathematical formula at right.BOOK, Formosa, Dan, Hamburger, Paul, Baseball field guide: an in-depth illustrated guide to the complete rules of baseball, Thunder’s Mouth Press, 2006, 228, 1-56025-700-8,books.google.com/books?id=ca_PpP9fVbsC&q=earned+run+average&pg=PA228,
• {{note label|League|b|b}}Recognized “major leagues” include the current American and National Leagues and several defunct leagues—the American Association, the Federal League, the Players’ League, and the Union Association.WEB,www.baseball-reference.com/teams/, Complete Baseball Team and Baseball Team Encyclopedias, Baseball-Reference.com, March 16, 2010,
• {{note label|Qualify|c|c}} A pitcher must average throwing at least one inning per game scheduled for his team during the season (currently 162 innings per 162 games) to qualify for the ERA title.WEB,mlb.mlb.com/documents/0/4/0/224919040/2017_Official_Baseball_Rules_dbt69t59.pdf, Official Baseball Rules, Major League Baseball, 2017, 138, May 8, 2017,

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See also

• Adjusted ERA+
• Defense-Independent ERA
• List of Major League Baseball leaders in career ERA
• Run average

References

General

• WEB,www.baseball-reference.com/awards/hof_pitching.shtml, Hall of Fame Pitching Register, Baseball-Reference.com, February 9, 2010,
• WEB,www.baseball-reference.com/leaders/earned_run_avg_leagues.shtml, Yearly League Leaders & Records for Earned Run Average, Baseball-Reference.com, January 31, 2010,

Inline citations

{{Reflist|30em}}{{NL ERA champions}}{{AL ERA champions}}{{MLB Triple Crown}}{{Baseball records}}{{featured list}}