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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Christy Mathewson# | 0.55 | 1900-1915 | |
| 2 | Toad Ramsey | 0.92 | 1905-1910 | |
| 3 | Deacon Phillippe | 0.93 | 1899-1906 | |
| 4 | Jake Campbell# | 1.02 | 1905-1915 | |
| 5 | Danny Maxwell# | 1.06 | 1908-1915 | |
| 6 | Jesse Burkett | 1.08 | 1903-1912 | |
| 7 | Addie Joss# | 1.18 | 1904-1915 | |
| 8 | Frank Groves# | 1.19 | 1904-1910 | |
| 9 | Adam Briggs# | 1.22 | 1908-1915 | |
| 10 | Matt Adams# | 1.23 | 1906-1915 | |
| 11 | Bob Black | 1.26 | 1904-1912 | |
| 12 | Brent Mattern# | 1.41 | 1904-1915 | |
| 13 | Pink Hawley# | 1.61 | 1901-1915 | |
| 14 | Ian Moseley# | 1.86 | 1907-1915 |
