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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OAVG | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Rube Waddell | .1148 | 1903 | |
| 2 | Hooks Wiltse | .1475 | 1906 | |
| 3 | Addie Joss | .1594 | 1905 | |
| 4 | Orval Overall | .1695 | 1910 | |
| 5 | Babe Adams# | .1719 | 1913 | |
| 6 | Harry Krause | .1724 | 1909 | |
| 7 | Frank Smith | .1746 | 1908 | |
| 7 | Jesse Tannehill | .1746 | 1903 | |
| 7 | Christy Mathewson# | .1746 | 1906 | |
| 10 | Eddie Plank# | .1875 | 1908 | |
| 10 | Cy Young | .1875 | 1901 | |
| 12 | Joe Wood# | .1884 | 1915 | |
| 13 | Babe Adams# | .1970 | 1914 | |
| 14 | Christy Mathewson# | .2000 | 1904 | |
| 15 | Mordecai Brown# | .2059 | 1909 | |
| 16 | Charles Bender# | .2083 | 1903 | |
| 17 | Russ Ford | .2097 | 1910 | |
| 17 | Orval Overall | .2097 | 1909 | |
| 19 | Tom Hughes | .2157 | 1909 | |
| 20 | Joe Williams# | .2203 | 1910 | |
| 21 | George McQuillan# | .2222 | 1908 | |
| 21 | Joe Lake | .2222 | 1910 | |
| 23 | Bill Donovan# | .2258 | 1907 | |
| 23 | Addie Joss | .2258 | 1906 | |
| 23 | Weldon Henley | .2258 | 1903 | |
| 26 | George Mullin | .2264 | 1907 | |
| 27 | Jack Chesbro | .2273 | 1907 | |
| 28 | Charles Bender# | .2286 | 1908 | |
| 29 | Christy Mathewson# | .2353 | 1911 | |
| 30 | Kid Nichols* | .2394 | 1892 | |
| 31 | Dutch Leonard# | .2414 | 1914 | |
| 32 | Cy Young | .2430 | 1892 | |
| 33 | Charles Bender# | .2442 | 1912 | |
| 34 | Charlie Smith | .2500 | 1907 | |
| 35 | Dutch Leonard# | .2537 | 1915 | |
| 36 | Jesse Tannehill | .2596 | 1901 | |
| 37 | Jeff Tesreau# | .2687 | 1914 | |
| 38 | Jeff Tesreau# | .2698 | 1915 | |
| 39 | Eddie Plank# | .2703 | 1903 | |
| 40 | Claude Hendrix# | .2727 | 1912 | |
| 41 | Rube Waddell | .2737 | 1901 | |
| 42 | Doc White | .2742 | 1906 | |
| 43 | Vean Gregg# | .2817 | 1911 | |
| 43 | Charles Bender# | .2817 | 1913 | |
| 43 | Charles Bender# | .2817 | 1911 | |
| 46 | Bill Bernhard | .2833 | 1906 | |
| 47 | Rube Waddell | .2857 | 1902 | |
| 47 | Rube Waddell | .2857 | 1908 | |
| 49 | Charles Bender# | .2951 | 1909 | |
| 50 | Rube Marquard# | .2969 | 1911 | |
| 51 | Red Ames# | .3051 | 1911 | |
| 52 | Vean Gregg# | .3077 | 1913 | |
| 53 | Mordecai Brown# | .3125 | 1910 | |
| 54 | George McConnell# | .3167 | 1913 | |
| 55 | Red Ames# | .3194 | 1905 | |
| 56 | Otto Hess | .3220 | 1906 | |
| 57 | Jack Pfiester | .3235 | 1907 | |
| 58 | George Winter | .3333 | 1901 | |
| 59 | Mordecai Brown# | .3402 | 1907 | |
| 60 | Rube Marquard# | .3443 | 1914 |
