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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Josh Gibson# | .5631 | 1931-1941 | |
| 2 | Biz Mackey# | .4969 | 1921-1939 | |
| 3 | Ernie Lombardi# | .4306 | 1927-1941 | |
| 4 | Art Koehler | .3921 | 1921-1931 | |
| 5 | Frank Cox | .3912 | 1928-1936 | |
| 6 | Larry Brown# | .3700 | 1921-1941 | |
| 7 | Frank Duncan | .3547 | 1923-1940 | |
| 8 | Quincy Trouppe# | .3515 | 1933-1941 | |
| 9 | Johnny Bassler | .3404 | 1928-1939 | |
| 10 | Ted Radcliffe# | .3389 | 1930-1941 | |
| 11 | Jose Maria Fernandez | .3367 | 1921-1936 | |
| 12 | Truck Hannah | .3327 | 1921-1933 | |
| 13 | Merv Shea | .2967 | 1922-1934 |
