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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Elmer Davis# | .4737 | 1899 | |
| 2 | Hugh Weaver# | .4497 | 1899 | |
| 3 | Clyde Evans# | .4069 | 1899 | |
| 4 | Pat Olson# | .3912 | 1899 | |
| 5 | Lew Cormack# | .3629 | 1899 | |
| 5 | Martin Queen# | .3629 | 1899 | |
| 7 | Ike Owns# | .3448 | 1899 |
