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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OAVG | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Babe Adams# | .1846 | 1906-1915 | |
| 2 | Orval Overall | .1855 | 1905-1913 | |
| 3 | Addie Joss | .1908 | 1902-1910 | |
| 4 | Jesse Tannehill | .2140 | 1894-1910 | |
| 5 | Eddie Plank# | .2319 | 1901-1915 | |
| 6 | Christy Mathewson# | .2429 | 1900-1915 | |
| 7 | Dutch Leonard# | .2480 | 1913-1915 | |
| 8 | Cy Young | .2509 | 1890-1911 | |
| 9 | Charles Bender# | .2552 | 1903-1915 | |
| 10 | Jeff Tesreau# | .2574 | 1912-1915 | |
| 11 | Joe Wood# | .2612 | 1908-1915 | |
| 12 | Rube Waddell | .2624 | 1897-1910 | |
| 13 | Deacon Phillippe | .2741 | 1899-1911 | |
| 14 | Otto Hess | .2845 | 1902-1914 | |
| 15 | Red Ames# | .2887 | 1903-1915 | |
| 16 | Mordecai Brown# | .2926 | 1903-1915 | |
| 17 | Bill Bernhard | .3071 | 1899-1907 | |
| 18 | Jack Pfiester | .3191 | 1904-1911 | |
| 19 | Vean Gregg# | .3298 | 1911-1915 | |
| 20 | Rube Marquard# | .3422 | 1908-1915 |
