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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | B9 | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Schoolboy Rowe# | 0.39 | 1933-1946 | |
| 2 | Spud Chandler# | 1.72 | 1937-1946 | |
| 3 | Tommy Bridges# | 1.76 | 1930-1946 | |
| 4 | Mort Cooper# | 2.40 | 1938-1946 | |
| 5 | Red Ruffing# | 2.84 | 1924-1945 | |
| 6 | Max Lanier# | 3.41 | 1938-1946 | |
| 7 | Hal Schumacher# | 5.23 | 1931-1942 |
