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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Walter Power# | .4891 | 1907 | |
| 2 | Frank Richards# | .4305 | 1907 | |
| 3 | Julius Ross# | .3972 | 1907 | |
| 4 | Ray Strasser# | .3801 | 1907 | |
| 5 | William Quincey# | .3655 | 1907 | |
| 6 | Charlie Honaker# | .3198 | 1907 | |
| 7 | Henry Fritz# | .3022 | 1907 |
