Major League Baseball Records
					Single Season - Pitching (Since 1893)
				(Pitchers mound was moved to 60 feet 6 inches in 1893)
Active players highlighted
	Earned Run Average							Wins
Rank	Name	Year	ERA				Rank	Name	Year	Wins
1	Dutch Leonard	1914	0.96				1	Jack Chesbro	1904	41
2	Mordecai Brown	1906	1.04				2	Ed Walsh	1908	40
3	Bob Gibson	1968	1.12				3	Christy Mathewson	1908	37
4	Walter Johnson	1913	1.14				4	Walter Johnson	1913	36
5	Christy Mathewson	1909	1.14				4	Amos Rusie	1894	36
6	Jack Pfeister	1907	1.15				4	Frank Killen	1893	36
7	Addie Joss	1908	1.16				4	Joe McGinnity	1904	36
8	Carl Lundgren	1907	1.17				4	Cy Young	1895	36
9	Grover Alexander	1915	1.22				9	Smokey Joe Wood	1912	34
10	Cy Young	1908	1.26				9	Cy Young	1893	34
	Strikeouts							Walks
Rank	Name	Year	Strikeouts				Rank	Name	Year	Walks
1	Nolan Ryan	1973	383				1	Amos Rusie	1893	218
2	Sandy Koufax	1965	382				2	Cy Seymour	1898	213
3	Randy Johnson	2001	372				3	Bob Feller	1938	208
4	Nolan Ryan	1974	367				4	Nolan Ryan	1977	204
5	Randy Johnson	1999	364				5	Nolan Ryan	1974	202
6	Rube Waddell	1904	349				6	Bob Feller	1941	194
7	Bob Feller	1946	348				7	Bob Newsom	1938	192
8	Randy Johnson	2000	347				8	Ted Breitenstein	1894	191
9	Nolan Ryan	1977	341				9	Tony Mullane	1893	189
10	Randy Johnson	2002	334				10	Sam Jones	1955	185
	Shutouts							Losses
Rank	Name	Year	SHO				Rank	Name	Year	Losses
1	Grover Alexander	1916	16				1	Red Donahue	1897	35
2	Jack Coombs	1910	13				2	Old Hoss Radbourn	1896	31
2	Bob Gibson	1968	13				3	Ted Breitenstein	1895	30
4	Grover Alexander	1915	12				4	Bill Hart	1896	29
5	Dean Chance	1964	11				4	Vic Willis	1905	29
5	Walter Johnson	1913	11				4	Jack Taylor	1898	29
5	Sandy Koufax	1963	11				7	Duke Esper	1893	28
5	Christy Mathewson	1908	11				7	Bill Hill	1896	28
5	Ed Walsh	1908	11				9	George Bell	1910	27
10	Mort Cooper	1942	10				9	Paul Derringer	1933	27
	Winning Percentage							Saves
Rank	Name	Year	Win Pct				Rank	Name	Year	Saves
1	Roy Face	1959	0.947				1	Francisco Rodriguez	2008	62
2	Tony Gonsolin	2022	0.941				2	Bobby Thigpen	1990	57
3	Rick Sutcliffe	1984	0.941				2	Edwin Diaz	2018	57
4	Johnny Allen	1937	0.938				4	John Smoltz	2002	55
5	Phil Regan	1966	0.933				4	Eric Gagne*	2003	55
6	Greg Maddux	1995	0.905				6	Mariano Rivera	2004	53
7	Randy Johnson	1995	0.900				6	Trevor Hoffman	1998	53
8	Ron Guidry	1978	0.893				6	Randy Myers	1993	53
9	Freddie Fitzsimmons	1940	0.889				9	Eric Gagne*	2002	52
9	Shane Bieber	2020	0.889				10	Rod Beck	1998	51
							10	Dennis Eckersley	1992	51
							10	Jim Johnson	2012	51
							10	Jeurys Familia	2016	51
* - Denotes suspected steroid use							10	Mark Melancon	2015	51
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Last Updated 10/13/24