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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OSLG | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Spud Chandler# | .2241 | 1937-1946 | |
| 2 | Max Lanier# | .2269 | 1938-1946 | |
| 3 | Red Ruffing# | .2663 | 1924-1945 | |
| 4 | Mort Cooper# | .2690 | 1938-1946 | |
| 5 | Tommy Bridges# | .3102 | 1930-1946 | |
| 6 | Schoolboy Rowe# | .3138 | 1933-1946 | |
| 7 | Hal Schumacher# | .3465 | 1931-1942 |
