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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOPS | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Addie Joss* | .4725 | 1902-1910 | |
| 2 | Ed Walsh* | .4763 | 1904-1917 | |
| 3 | Terry Larkin | .5030 | 1878-1879 | |
| 4 | Mordecai Brown* | .5045 | 1903-1916 | |
| 5 | Rube Waddell* | .5073 | 1900-1910 | |
| 6 | Walter Johnson* | .5074 | 1907-1927 | |
| 7 | Joe Wood | .5077 | 1908-1922 | |
| 8 | Larry Corcoran | .5080 | 1880-1886 | |
| 9 | Babe Ruth* | .5098 | 1914-1935 | |
| 10 | Jack Pfiester | .5120 | 1903-1911 | |
| 11 | Tim Keefe* | .5125 | 1880-1893 | |
| 12 | Frank Smith | .5132 | 1904-1912 | |
| 13 | Christy Mathewson* | .5139 | 1900-1916 | |
| 14 | Jim Whitney | .5177 | 1881-1885 | |
| 15 | Mariano Rivera* | .5188 | 1995-2013 | |
| 16 | Fred Glade | .5194 | 1902-1908 | |
| 17 | Ed Reulbach | .5197 | 1905-1917 | |
| 18 | Harry Howell | .5220 | 1898-1910 | |
| 19 | Reb Russell | .5232 | 1913-1923 | |
| 20 | Chief Bender* | .5234 | 1903-1925 | |
| 21 | Jeff Tesreau | .5239 | 1912-1918 | |
| 22 | Charlie Ferguson | .5242 | 1884-1887 | |
| 23 | Frank Owen | .5251 | 1901-1909 | |
| 24 | Orval Overall | .5260 | 1905-1913 | |
| 25 | Nick Altrock | .5283 | 1902-1933 | |
| 26 | Eddie Plank* | .5306 | 1901-1917 | |
| 27 | Doc White | .5319 | 1901-1913 | |
| 28 | Jack Chesbro* | .5329 | 1899-1909 | |
| 29 | Deacon Phillippe | .5350 | 1900-1911 | |
| 30 | Charley Radbourn* | .5351 | 1881-1891 | |
| 31 | George McQuillan | .5353 | 1907-1918 | |
| 31 | Jake Weimer | .5353 | 1903-1909 | |
| 33 | Joe McGinnity* | .5365 | 1900-1908 | |
| 34 | Noodles Hahn | .5375 | 1899-1906 | |
| 35 | Sam Leever | .5380 | 1898-1910 | |
| 36 | Cy Falkenberg | .5390 | 1903-1917 | |
| 37 | Bill Donovan | .5398 | 1899-1918 | |
| 38 | Barney Pelty | .5421 | 1903-1912 | |
| 39 | Tommy Bond | .5431 | 1877-1881 | |
| 40 | Babe Adams | .5432 | 1906-1926 | |
| 41 | Cy Young* | .5436 | 1890-1911 | |
| 42 | Harry Coveleski | .5442 | 1907-1918 | |
| 43 | Russ Ford | .5451 | 1909-1913 | |
| 44 | Charlie Buffinton | .5455 | 1882-1889 | |
| 45 | George Winter | .5457 | 1901-1908 | |
| 46 | Larry Cheney | .5470 | 1911-1919 | |
| 46 | Roy Patterson | .5470 | 1901-1907 | |
| 48 | Nap Rucker | .5474 | 1907-1916 | |
| 49 | Ed Killian | .5479 | 1903-1910 | |
| 50 | Sandy Koufax* | .5487 | 1955-1966 | |
| 50 | J.R. Richard | .5487 | 1971-1980 | |
| 52 | Fred Beebe | .5489 | 1906-1916 | |
| 53 | Hippo Vaughn | .5493 | 1908-1921 | |
| 54 | Joe Benz | .5494 | 1911-1919 | |
| 55 | Jack Taylor | .5503 | 1898-1907 | |
| 55 | Carl Lundgren | .5503 | 1902-1909 | |
| 57 | Amos Rusie* | .5506 | 1890-1901 | |
| 57 | Pete Alexander* | .5506 | 1911-1930 | |
| 59 | Hooks Wiltse | .5512 | 1904-1914 | |
| 60 | Fred Goldsmith | .5513 | 1880-1884 | |
| 60 | Bill Dinneen | .5513 | 1900-1909 | |
| 62 | Mickey Welch* | .5516 | 1880-1892 | |
| 63 | John Clarkson* | .5521 | 1882-1894 | |
| 63 | Eddie Cicotte | .5521 | 1905-1920 | |
| 65 | Hoyt Wilhelm* | .5524 | 1952-1972 | |
| 66 | Dick Rudolph | .5536 | 1910-1927 | |
| 67 | Trevor Hoffman | .5539 | 1993-2010 | |
| 68 | Jim Scott | .5540 | 1909-1917 | |
| 68 | Howie Camnitz | .5540 | 1904-1913 | |
| 70 | Cy Morgan | .5544 | 1903-1913 | |
| 71 | Pedro Martinez* | .5555 | 1992-2009 | |
| 72 | Nolan Ryan* | .5556 | 1966-1993 | |
| 73 | Frank Miller | .5558 | 1913-1923 | |
| 74 | Jesse Tannehill | .5565 | 1894-1911 | |
| 75 | Vic Willis* | .5567 | 1898-1910 | |
| 76 | Ray Collins | .5569 | 1909-1915 | |
| 77 | Dan Casey | .5570 | 1886-1889 | |
| 78 | Bob Wicker | .5573 | 1901-1906 | |
| 78 | Pud Galvin* | .5573 | 1875-1892 | |
| 80 | Red Ames | .5576 | 1903-1919 | |
| 81 | Andy Messersmith | .5585 | 1968-1979 | |
| 82 | Bob Ewing | .5589 | 1902-1912 | |
| 82 | Tony Mullane | .5589 | 1890-1893 | |
| 84 | Ned Garvin | .5592 | 1896-1904 | |
| 85 | Jack Coombs | .5593 | 1906-1920 | |
| 86 | Ed Karger | .5597 | 1906-1911 | |
| 87 | Fred Toney | .5615 | 1911-1923 | |
| 88 | Slim Sallee | .5616 | 1908-1921 | |
| 89 | Willie Mitchell | .5617 | 1909-1919 | |
| 90 | Earl Moore | .5620 | 1901-1913 | |
| 91 | Al Demaree | .5634 | 1912-1919 | |
| 92 | Claude Hendrix | .5639 | 1911-1920 | |
| 93 | Tully Sparks | .5643 | 1897-1910 | |
| 94 | Bill Bernhard | .5644 | 1899-1907 | |
| 94 | George Mullin | .5644 | 1902-1913 | |
| 96 | Jack Powell | .5646 | 1899-1912 | |
| 97 | Tony Soto# | .5651 | 2088-2098 | |
| 98 | Al Mamaux | .5653 | 1913-1924 | |
| 99 | Bob Rhoads | .5657 | 1902-1909 | |
| 100 | Lew Richie | .5661 | 1906-1913 |
