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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Joe Watlington# | .4278 | 1890 | |
| 2 | Nate Galvin# | .4234 | 1890 | |
| 3 | Percy Kendrick# | .4233 | 1890 | |
| 4 | Oliver Menzies# | .4049 | 1890 | |
| 5 | Otis Watters# | .3909 | 1890 | |
| 6 | Otis Dalton# | .2459 | 1890 | |
| 7 | Art Francois# | .2443 | 1890 |
