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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Harry Leavitt# | .5769 | 1890 | |
| 2 | Irving Sullivan# | .3719 | 1890 | |
| 3 | Silas Roby# | .3448 | 1890 | |
| 4 | Roy Geter# | .3229 | 1890 | |
| 5 | Tom Maddox# | .3174 | 1890 | |
| 6 | Dick Conant# | .3103 | 1890 |
