Winning Percentage Year-by-Year Leaders '1876 - 2013'
Year	American League	WP (Raw)	Team(s)	Year	National League	WP (Raw)	Team(s)
1876	-	-	-	1876	Al Spalding	0.797 (0.79661)	Chicago
1877	-	-	-	1877	Tommy Bond	0.702 (0.70175)	Boston
1878	-	-	-	1878	Harry Wheeler	0.857 (0.85714)	Providence
1879	-	-	-	1879	John Ward	0.712 (0.71212)	Providence
1880	-	-	-	1880	Fred Goldsmith	0.875 (0.87500)	Chicago
1881	-	-	-	1881	Old Hoss Radbourn	0.694 (0.69444)	Providence
1882	-	-	-	1882	Larry Corcoran	0.692 (0.69231)	Chicago
1883	-	-	-	1883	Jim McCormick	0.700 (0.70000)	Cleveland
1884	-	-	-	1884	Old Hoss Radbourn	0.831 (0.83099)	Providence
1885	-	-	-	1885	Jim McCormick	0.833 (0.83333)	Chicago
							Providence
1886	-	-	-	1886	Jocko Flynn	0.793 (0.79310)	Chicago
1887	-	-	-	1887	Larry Twitchell	0.917 (0.91667)	Detroit
1888	-	-	-	1888	Tim Keefe	0.745 (0.74468)	New York
1889	-	-	-	1889	John Clarkson	0.721 (0.72059)	Boston
1890	-	-	-	1890	Tom Lovett	0.732 (0.73171)	Brooklyn
1891	-	-	-	1891	John Ewing	0.724 (0.72414)	New York
1892	-	-	-	1892	Mike Sullivan	0.750 (0.75000)	Cincinnati
					Cy Young		Cleveland
1893	-	-	-	1893	Fritz Clausen	0.750 (0.75000)	Chicago
							Louisville
					Hank Gastright		Boston
							Pittsburgh
1894	-	-	-	1894	Jouett Meekin	0.786 (0.78571)	New York
1895	-	-	-	1895	Bill Hoffer	0.838 (0.83784)	Baltimore
1896	-	-	-	1896	Bill Hoffer	0.781 (0.78125)	Baltimore
1897	-	-	-	1897	Fred Klobedanz	0.788 (0.78788)	Boston
1898	-	-	-	1898	Ted Lewis	0.765 (0.76471)	Boston
1899	-	-	-	1899	Jay Hughes	0.824 (0.82353)	Brooklyn
					Al Orth		Philadelphia
1900	-	-	-	1900	Joe McGinnity	0.778 (0.77778)	Brooklyn
1901	Clark Griffith	0.774 (0.77419)	Chicago	1901	Ed Doheny	0.750 (0.75000)	New York
							Pittsburgh
1902	Rube Waddell	0.774 (0.77419)	Philadelphia	1902	Jack Chesbro	0.824 (0.82353)	Pittsburgh
1903	Cy Young	0.757 (0.75676)	Boston	1903	Sam Leever	0.781 (0.78125)	Pittsburgh
1904	Jack Chesbro	0.774 (0.77358)	New York	1904	Joe McGinnity	0.814 (0.81395)	New York
1905	Rube Waddell	0.730 (0.72973)	Philadelphia	1905	Sam Leever	0.800 (0.80000)	Pittsburgh
1906	Eddie Plank	0.760 (0.76000)	Philadelphia	1906	Ed Reulbach	0.826 (0.82609)	Chicago
1907	Bill Donovan	0.862 (0.86207)	Detroit	1907	Ed Reulbach	0.810 (0.80952)	Chicago
1908	Cy Falkenberg	0.750 (0.75000)	Cleveland	1908	Ed Reulbach	0.774 (0.77419)	Chicago
			Washington
1909	George Mullin	0.784 (0.78378)	Detroit	1909	Howie Camnitz	0.806 (0.80645)	Pittsburgh
					Christy Mathewson		New York
1910	Chief Bender	0.821 (0.82143)	Philadelphia	1910	Deacon Phillippe	0.875 (0.87500)	Pittsburgh
1911	Chief Bender	0.773 (0.77273)	Philadelphia	1911	Rube Marquard	0.774 (0.77419)	New York
1912	Joe Wood	0.872 (0.87179)	Boston	1912	Claude Hendrix	0.727 (0.72727)	Pittsburgh
1913	Walter Johnson	0.837 (0.83721)	Washington	1913	Bert Humphries	0.800 (0.80000)	Chicago
1914	Chief Bender	0.850 (0.85000)	Philadelphia	1914	Bill James	0.788 (0.78788)	Boston
1915	Joe Wood	0.750 (0.75000)	Boston	1915	Grover Alexander	0.756 (0.75610)	Philadelphia
1916	Nick Cullop	0.684 (0.68421)	New York	1916	Tom Hughes	0.842 (0.84211)	Boston
1917	Ed Klepfer	0.778 (0.77778)	Cleveland	1917	Ferdie Schupp	0.750 (0.75000)	New York
1918	Sam Jones	0.762 (0.76190)	Boston	1918	Erskine Mayer	0.750 (0.75000)	Philadelphia
							Pittsburgh
1919	Eddie Cicotte	0.806 (0.80556)	Chicago	1919	Dolf Luque	0.769 (0.76923)	Cincinnati
1920	Elmer Myers	0.900 (0.90000)	Boston	1920	Burleigh Grimes	0.676 (0.67647)	Brooklyn
			Cleveland
1921	Carl Mays	0.750 (0.75000)	New York	1921	Jeff Pfeffer	0.750 (0.75000)	Brooklyn
	Allen Sothoron		Boston				St. Louis
			Cleveland
			St. Louis
1922	Joe Bush	0.788 (0.78788)	New York	1922	Phil Douglas	0.733 (0.73333)	New York
1923	Herb Pennock	0.760 (0.76000)	New York	1923	Dolf Luque	0.771 (0.77143)	Cincinnati
1924	Walter Johnson	0.767 (0.76667)	Washington	1924	Emil Yde	0.842 (0.84211)	Pittsburgh
1925	Alex Ferguson	0.833 (0.83333)	Boston	1925	Bill Sherdel	0.714 (0.71429)	St. Louis
			New York
			Washington
1926	Howard Ehmke	0.750 (0.75000)	Boston	1926	Ray Kremer	0.769 (0.76923)	Pittsburgh
			Philadelphia
1927	Eddie Rommel	0.786 (0.78571)	Philadelphia	1927	Larry Benton	0.722 (0.72222)	Boston
							New York
1928	Alvin Crowder	0.808 (0.80769)	St. Louis	1928	Larry Benton	0.735 (0.73529)	New York
1929	Eddie Rommel	0.857 (0.85714)	Philadelphia	1929	Charlie Root	0.760 (0.76000)	Chicago
1930	Lefty Grove	0.848 (0.84848)	Philadelphia	1930	Clarence Mitchell	0.769 (0.76923)	New York
							St. Louis
1931	Lefty Grove	0.886 (0.88571)	Philadelphia	1931	Jesse Haines	0.800 (0.80000)	St. Louis
1932	Johnny Allen	0.810 (0.80952)	New York	1932	Lon Warneke	0.786 (0.78571)	Chicago
1933	Lefty Grove	0.750 (0.75000)	Philadelphia	1933	Bud Tinning	0.684 (0.68421)	Chicago
	Russ Van Atta		New York
1934	Lefty Gomez	0.839 (0.83871)	New York	1934	Dizzy Dean	0.811 (0.81081)	St. Louis
1935	Elden Auker	0.720 (0.72000)	Detroit	1935	Bill Lee	0.769 (0.76923)	Chicago
1936	Bump Hadley	0.778 (0.77778)	New York	1936	Carl Hubbell	0.812 (0.81250)	New York
1937	Johnny Allen	0.938 (0.93750)	Cleveland	1937	Carl Hubbell	0.733 (0.73333)	New York
1938	Lefty Grove	0.778 (0.77778)	Boston	1938	Bill Lee	0.710 (0.70968)	Chicago
1939	Atley Donald	0.812 (0.81250)	New York	1939	Paul Derringer	0.781 (0.78125)	Cincinnati
1940	Schoolboy Rowe	0.842 (0.84211)	Detroit	1940	Freddie Fitzsimmons	0.889 (0.88889)	Brooklyn
1941	Lefty Gomez	0.750 (0.75000)	New York	1941	Elmer Riddle	0.826 (0.82609)	Cincinnati
1942	Tiny Bonham	0.808 (0.80769)	New York	1942	Howie Krist	0.812 (0.81250)	St. Louis
1943	Spud Chandler	0.833 (0.83333)	New York	1943	Clyde Shoun	0.737 (0.73684)	Cincinnati
					Whit Wyatt		Brooklyn
1944	Tex Hughson	0.783 (0.78261)	Boston	1944	Ted Wilks	0.810 (0.80952)	St. Louis
1945	Bob Muncrief	0.765 (0.76471)	St. Louis	1945	Harry Brecheen	0.789 (0.78947)	St. Louis
1946	Dave Ferriss	0.806 (0.80645)	Boston	1946	Schoolboy Rowe	0.733 (0.73333)	Philadelphia
1947	Spec Shea	0.737 (0.73684)	New York	1947	Larry Jansen	0.808 (0.80769)	New York
1948	Jack Kramer	0.783 (0.78261)	Boston	1948	Rip Sewell	0.812 (0.81250)	Pittsburgh
1949	Ellis Kinder	0.793 (0.79310)	Boston	1949	Ralph Branca	0.722 (0.72222)	Brooklyn
1950	Vic Raschi	0.724 (0.72414)	New York	1950	Sal Maglie	0.818 (0.81818)	New York
1951	Bob Feller	0.733 (0.73333)	Cleveland	1951	Preacher Roe	0.880 (0.88000)	Brooklyn
	Morrie Martin		Philadelphia
1952	Bobby Shantz	0.774 (0.77419)	Philadelphia	1952	Eddie Yuhas	0.857 (0.85714)	St. Louis
1953	Ed Lopat	0.800 (0.80000)	New York	1953	Preacher Roe	0.786 (0.78571)	Brooklyn
1954	Sandy Consuegra	0.842 (0.84211)	Chicago	1954	Johnny Antonelli	0.750 (0.75000)	New York
					Hoyt Wilhelm		New York
1955	Tommy Byrne	0.762 (0.76190)	New York	1955	Don Newcombe	0.800 (0.80000)	Brooklyn
1956	Whitey Ford	0.760 (0.76000)	New York	1956	Don Newcombe	0.794 (0.79412)	Brooklyn
1957	Dick Donovan	0.727 (0.72727)	Chicago	1957	Bob Buhl	0.720 (0.72000)	Milwaukee
	Tom Sturdivant		New York
1958	Bob Turley	0.750 (0.75000)	New York	1958	Jim Brosnan	0.667 (0.66667)	Chicago
							St. Louis
					Lew Burdette		Milwaukee
					Warren Spahn		Milwaukee
1959	Jack Harshman	0.833 (0.83333)	Baltimore	1959	Roy Face	0.947 (0.94737)	Pittsburgh
			Boston
			Cleveland
1960	Jim Coates	0.812 (0.81250)	New York	1960	Lindy McDaniel	0.750 (0.75000)	St. Louis
1961	Whitey Ford	0.862 (0.86207)	New York	1961	Johnny Podres	0.783 (0.78261)	Los Angeles
1962	Dave Wickersham	0.733 (0.73333)	Kansas City	1962	Bob Purkey	0.821 (0.82143)	Cincinnati
1963	Whitey Ford	0.774 (0.77419)	New York	1963	Ron Perranoski	0.842 (0.84211)	Los Angeles
1964	Wally Bunker	0.792 (0.79167)	Baltimore	1964	Sandy Koufax	0.792 (0.79167)	Los Angeles
1965	Mudcat Grant	0.750 (0.75000)	Minnesota	1965	Sandy Koufax	0.765 (0.76471)	Los Angeles
1966	Dave Boswell	0.706 (0.70588)	Minnesota	1966	Phil Regan	0.933 (0.93333)	Los Angeles
1967	Jose Santiago	0.750 (0.75000)	Boston	1967	Nelson Briles	0.737 (0.73684)	St. Louis
1968	Denny McLain	0.838 (0.83784)	Detroit	1968	Steve Blass	0.750 (0.75000)	Pittsburgh
1969	Mike Nagy	0.857 (0.85714)	Boston	1969	Bob Moose	0.824 (0.82353)	Pittsburgh
1970	Steve Hargan	0.786 (0.78571)	Cleveland	1970	Wayne Simpson	0.824 (0.82353)	Cincinnati
1971	Dave McNally	0.808 (0.80769)	Baltimore	1971	Tug McGraw	0.733 (0.73333)	New York
1972	Catfish Hunter	0.750 (0.75000)	Oakland	1972	Gary Nolan	0.750 (0.75000)	Cincinnati
1973	Roger Moret	0.867 (0.86667)	Boston	1973	George Stone	0.800 (0.80000)	New York
1974	Bill Champion	0.733 (0.73333)	Milwaukee	1974	Tommy John	0.812 (0.81250)	Los Angeles
1975	Roger Moret	0.824 (0.82353)	Boston	1975	Al Hrabosky	0.812 (0.81250)	St. Louis
1976	Bill Campbell	0.773 (0.77273)	Minnesota	1976	Rick Rhoden	0.800 (0.80000)	Los Angeles
1977	Don Gullett	0.778 (0.77778)	New York	1977	Tom Seaver	0.824 (0.82353)	Cincinnati
							New York
1978	Ron Guidry	0.893 (0.89286)	New York	1978	Gaylord Perry	0.778 (0.77778)	San Diego
1979	Ron Davis	0.875 (0.87500)	New York	1979	Jim Bibby	0.750 (0.75000)	Pittsburgh
1980	Steve Stone	0.781 (0.78125)	Baltimore	1980	Jim Bibby	0.760 (0.76000)	Pittsburgh
1981	Steve Comer	0.800 (0.80000)	Texas	1981	Tom Seaver	0.875 (0.87500)	Cincinnati
1982	Jim Palmer	0.750 (0.75000)	Baltimore	1982	Phil Niekro	0.810 (0.80952)	Atlanta
	Pete Vuckovich		Milwaukee
1983	Moose Haas	0.812 (0.81250)	Milwaukee	1983	John Denny	0.760 (0.76000)	Philadelphia
1984	Doyle Alexander	0.739 (0.73913)	Toronto	1984	Rick Sutcliffe	0.941 (0.94118)	Chicago
1985	Ron Guidry	0.786 (0.78571)	New York	1985	Orel Hershiser	0.864 (0.86364)	Los Angeles
1986	Roger Clemens	0.857 (0.85714)	Boston	1986	Bob Ojeda	0.783 (0.78261)	New York
1987	Mike Henneman	0.786 (0.78571)	Detroit	1987	Rick Aguilera	0.786 (0.78571)	New York
1988	Frank Viola	0.774 (0.77419)	Minnesota	1988	David Cone	0.870 (0.86957)	New York
1989	Bret Saberhagen	0.793 (0.79310)	Kansas City	1989	Sid Fernandez	0.737 (0.73684)	New York
					Scott Garrelts		San Francisco
1990	Bob Welch	0.818 (0.81818)	Oakland	1990	Doug Drabek	0.786 (0.78571)	Pittsburgh
1991	Joe Hesketh	0.750 (0.75000)	Boston	1991	Cris Carpenter	0.714 (0.71429)	St. Louis
					Kelly Downs		San Francisco
					Jose Rijo		Cincinnati
					John Smiley		Pittsburgh
1992	Mike Mussina	0.783 (0.78261)	Baltimore	1992	Bob Tewksbury	0.762 (0.76190)	St. Louis
1993	Juan Guzman	0.824 (0.82353)	Toronto	1993	Mark Portugal	0.818 (0.81818)	Houston
1994	Jason Bere	0.857 (0.85714)	Chicago	1994	Marvin Freeman	0.833 (0.83333)	Colorado
1995	Randy Johnson	0.900 (0.90000)	Seattle	1995	Greg Maddux	0.905 (0.90476)	Atlanta
1996	Jamie Moyer	0.875 (0.87500)	Boston	1996	John Smoltz	0.750 (0.75000)	Atlanta
			Seattle
1997	Randy Johnson	0.833 (0.83333)	Seattle	1997	Greg Maddux	0.826 (0.82609)	Atlanta
1998	David Wells	0.818 (0.81818)	New York	1998	John Smoltz	0.850 (0.85000)	Atlanta
1999	Pedro Martinez	0.852 (0.85185)	Boston	1999	Mike Hampton	0.846 (0.84615)	Houston
2000	Tim Hudson	0.769 (0.76923)	Oakland	2000	Matt Herges	0.786 (0.78571)	Los Angeles
2001	Roger Clemens	0.870 (0.86957)	New York	2001	Roy Oswalt	0.824 (0.82353)	Houston
2002	Pedro Martinez	0.833 (0.83333)	Boston	2002	Randy Johnson	0.828 (0.82759)	Arizona
2003	Johan Santana	0.800 (0.80000)	Minnesota	2003	Jason Schmidt	0.773 (0.77273)	San Francisco
2004	Curt Schilling	0.778 (0.77778)	Boston	2004	Roger Clemens	0.818 (0.81818)	Houston
2005	Cliff Lee	0.783 (0.78261)	Cleveland	2005	Jorge Sosa	0.812 (0.81250)	Atlanta
2006	Francisco Liriano	0.800 (0.80000)	Minnesota	2006	Chuck James	0.733 (0.73333)	Atlanta
2007	Justin Verlander	0.750 (0.75000)	Detroit	2007	Brad Penny	0.800 (0.80000)	Los Angeles
					David Wells		Los Angeles
							San Diego
2008	Cliff Lee	0.880 (0.88000)	Cleveland	2008	Adam Wainwright	0.786 (0.78571)	St. Louis
2009	Felix Hernandez	0.792 (0.79167)	Seattle	2009	Chris Carpenter	0.810 (0.80952)	St. Louis
2010	Tommy Hunter	0.765 (0.76471)	Texas	2010	Ubaldo Jimenez	0.704 (0.70370)	Colorado
2011	Doug Fister	0.889 (0.88889)	Detroit	2011	Ian Kennedy	0.840 (0.84000)	Arizona
			Seattle
2012	David Price	0.800 (0.80000)	Tampa Bay	2012	Kyle Lohse	0.842 (0.84211)	St. Louis
	Jered Weaver		Los Angeles
2013	Yu Darvish	0.875 (0.87500)	Texas	2013	Lance Lynn	0.857 (0.85714)	St. Louis
Year	American League	WP (Raw)	Team(s)	Year	National League	WP (Raw)	Team(s)
Current Through 2013 Season

	Cross reference Cy Young Award winners too see how important winning percentage is to baseball writers when deciding who the recipient will be at the end of the regular season. Did you know that the Major League record for single season winning percentage was set during the 1959 season by Roy Face of the Pittsburgh Pirates? Use this chart to find the first leader from your favorite team. Use it to see who holds the record for consecutive seasons leading the league. The see if you can determinoe who the all time winning percentage leader is.