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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Josh Gibson# | .4030 | 1931-1941 | |
| 2 | Johnny Bassler | .3939 | 1928-1939 | |
| 3 | Biz Mackey# | .3829 | 1921-1939 | |
| 4 | Frank Duncan | .3612 | 1923-1940 | |
| 5 | Ernie Lombardi# | .3602 | 1927-1941 | |
| 6 | Art Koehler | .3503 | 1921-1931 | |
| 7 | Frank Cox | .3448 | 1928-1936 | |
| 8 | Merv Shea | .3403 | 1922-1934 | |
| 9 | Jose Maria Fernandez | .3307 | 1921-1936 | |
| 10 | Truck Hannah | .3208 | 1921-1933 | |
| 11 | Larry Brown# | .3178 | 1921-1941 | |
| 12 | Quincy Trouppe# | .3176 | 1933-1941 | |
| 13 | Ted Radcliffe# | .2905 | 1930-1941 |
