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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOPS | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Rube Waddell | .3306 | 1903 | |
| 2 | Hooks Wiltse | .3416 | 1906 | |
| 3 | Christy Mathewson | .4111 | 1906 | |
| 4 | Addie Joss | .4150 | 1905 | |
| 5 | Harry Krause | .4327 | 1909 | |
| 6 | Babe Adams# | .4375 | 1913 | |
| 7 | Jesse Tannehill | .4471 | 1903 | |
| 8 | Mordecai Brown | .4600 | 1909 | |
| 9 | Al Demaree# | .4610 | 1916 | |
| 10 | Cy Young* | .4700 | 1901 | |
| 11 | Frank Smith | .4740 | 1908 | |
| 12 | Eddie Plank# | .4808 | 1908 | |
| 13 | Joe Wood# | .4937 | 1915 | |
| 14 | Bill Donovan# | .5035 | 1907 | |
| 15 | Orval Overall | .5118 | 1910 | |
| 16 | Kid Nichols* | .5194 | 1892 | |
| 17 | Christy Mathewson | .5233 | 1904 | |
| 18 | Babe Adams# | .5307 | 1914 | |
| 19 | Cy Young* | .5347 | 1892 | |
| 20 | Russ Ford | .5365 | 1910 | |
| 21 | Charles Bender# | .5424 | 1903 | |
| 22 | Addie Joss | .5429 | 1906 | |
| 23 | Ferdie Schupp# | .5452 | 1916 | |
| 24 | Joe Williams# | .5573 | 1910 | |
| 25 | Tom Hughes | .5683 | 1909 | |
| 26 | George Mullin | .5756 | 1907 | |
| 27 | Charles Bender# | .5800 | 1908 | |
| 28 | Dutch Leonard# | .5885 | 1916 | |
| 29 | Charles Bender# | .5918 | 1912 | |
| 30 | Jesse Tannehill | .5960 | 1901 | |
| 31 | Jack Chesbro | .6055 | 1907 | |
| 32 | Babe Ruth# | .6083 | 1916 | |
| 33 | Christy Mathewson | .6105 | 1911 | |
| 34 | Orval Overall | .6226 | 1909 | |
| 35 | Weldon Henley | .6269 | 1903 | |
| 36 | Jeff Tesreau# | .6285 | 1914 | |
| 37 | George McQuillan# | .6409 | 1908 | |
| 38 | Joe Lake | .6450 | 1910 | |
| 39 | Dutch Leonard# | .6473 | 1914 | |
| 40 | Charlie Smith | .6476 | 1907 | |
| 41 | Doc White | .6633 | 1906 | |
| 42 | Eddie Plank# | .6764 | 1903 | |
| 43 | Jeff Tesreau# | .6785 | 1915 | |
| 44 | Rube Marquard# | .6802 | 1911 | |
| 45 | Dutch Leonard# | .6825 | 1915 | |
| 46 | Rube Waddell | .6853 | 1901 | |
| 47 | Charles Bender# | .6898 | 1913 | |
| 48 | Otto Hess | .7108 | 1906 | |
| 49 | Charles Bender# | .7161 | 1911 | |
| 50 | Rube Waddell | .7251 | 1902 | |
| 51 | Rube Waddell | .7381 | 1908 | |
| 52 | Bill Bernhard | .7448 | 1906 | |
| 53 | George McConnell | .7538 | 1913 | |
| 54 | Red Ames# | .7543 | 1905 | |
| 55 | Charles Bender# | .7546 | 1909 | |
| 56 | Red Ames# | .7606 | 1911 | |
| 57 | Mordecai Brown | .7652 | 1910 | |
| 58 | Vean Gregg# | .7732 | 1911 | |
| 59 | Claude Hendrix# | .7787 | 1912 | |
| 60 | Jack Pfiester | .7826 | 1907 | |
| 61 | Mordecai Brown | .7952 | 1907 | |
| 62 | George Winter | .8168 | 1901 | |
| 63 | Rube Marquard# | .8708 | 1914 | |
| 64 | Vean Gregg# | .8843 | 1913 |
