San Francisco Giants Winning Percentage Leaders

Career totals with the Giants and the best single seasons in club history. Records run through the 2025 season.

Sal Maglie holds the Giants career record with .693 winning percentage. The single-season record is .833, by Hoyt Wilhelm in 1952.

ERA W SO SV WHIP IP K/9 BB/9 K/BB SHO CG GS G L BB W-L%

Rate records use the league's own minimums: a season needs the standard 1.0 inning per team game with the club, a career 1,000+ innings pitched with the club.

All-time Giants leaders

Career totals with the club

#	Player	With the club	W-L%	G
1	Sal Maglie	1945–1955	.693	221
2	Tim Keefe	1885–1891	.680	272
3	Jason Schmidt	2001–2006	.678	162
4	Christy Mathewson	1900–1916	.664	635
5	Jesse Barnes	1918–1923	.656	181
6	Doc Crandall	1908–1913	.651	217
7	Art Nehf	1919–1926	.641	226
8	Joe McGinnity	1902–1908	.632	300
9	Juan Marichal	1960–1973	.630	458
10	Carl Hubbell	1928–1943	.622	535
11	Mickey Welch	1883–1892	.620	427
12	Hooks Wiltse	1904–1914	.615	339
13	Jeff Tesreau	1912–1918	.615	247
14	Jouett Meekin	1894–1899	.611	217
15	Freddie Fitzsimmons	1925–1937	.599	403
16	Amos Rusie	1890–1898	.589	427
17	Red Ames	1903–1913	.584	282
18	Larry Jansen	1947–1954	.583	283
19	Rube Marquard	1908–1915	.575	239
20	Jack Sanford	1959–1965	.571	233
21	Kirk Rueter	1996–2005	.568	281
22	Hal Schumacher	1931–1946	.566	391
23	Bobby Bolin	1961–1969	.566	345
24	Tim Lincecum	2007–2015	.565	269
25	Madison Bumgarner	2009–2019	.564	289

Single-season Giants records

Best seasons in club history

#	Player	Season	W-L%	G
1	Hoyt Wilhelm	1952	.833	71
2	Sal Maglie	1950	.818	47
3	Joe McGinnity	1904	.814	51
4	Carl Hubbell	1936	.813	42
4	Hooks Wiltse	1904	.813	24
6	Doc Crandall	1910	.810	42
7	Larry Jansen	1947	.808	42
8	Juan Marichal	1966	.807	37
8	Christy Mathewson	1909	.807	37
10	Mickey Welch	1885	.800	56
11	Sal Maglie	1951	.793	42
12	Shawn Estes	1997	.792	32
13	Jouett Meekin	1894	.786	53
14	Johnny Cueto	2016	.783	32
14	Tim Lincecum	2008	.783	34
16	Art Nehf	1924	.778	30
17	Christy Mathewson	1905	.775	43
18	Rube Marquard	1911	.774	45
18	Jack Sanford	1962	.774	39
20	Jason Schmidt	2003	.773	29
21	Christy Mathewson	1908	.771	56
22	Al Demaree	1913	.765	31
22	Bill Lohrman	1942	.765	26
24	Jack Bentley	1924	.762	28
24	Matt Cain	2012	.762	32