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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Bucky Walters# | .2121 | 1940 | |
| 2 | Mort Cooper# | .2258 | 1943 | |
| 2 | Mort Cooper# | .2258 | 1944 | |
| 4 | Bobo Newsom# | .2292 | 1940 | |
| 5 | Schoolboy Rowe# | .2317 | 1934 | |
| 6 | Claude Passeau# | .2381 | 1945 | |
| 6 | Schoolboy Rowe# | .2381 | 1935 | |
| 8 | Denny Galehouse# | .2571 | 1944 | |
| 9 | Max Lanier# | .2581 | 1943 | |
| 10 | Red Ruffing# | .2714 | 1938 | |
| 11 | Johnny Beazley# | .2740 | 1942 | |
| 12 | Spud Chandler# | .2778 | 1943 | |
| 13 | Red Ruffing# | .2877 | 1942 | |
| 14 | Tommy Bridges# | .2973 | 1935 | |
| 15 | Tommy Bridges# | .3067 | 1934 | |
| 16 | Hal Newhouser# | .3295 | 1945 | |
| 17 | Hank Borowy# | .3590 | 1945 |
