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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ephraim Gallagher# | .4044 | 1881-1889 | |
| 2 | Rufus Riddick# | .3985 | 1878-1889 | |
| 3 | Andy Stanhope# | .3920 | 1879-1889 | |
| 4 | Hank Seidel# | .3863 | 1880-1890 | |
| 5 | Martin Jarvis# | .3834 | 1879-1890 | |
| 6 | Alfred Calhoun# | .3757 | 1879-1883 | |
| 7 | Ned Dupree | .3059 | 1879-1886 | |
| 8 | Reginald Lafleur# | .2899 | 1880-1889 | |
| 9 | Jeff Work | .2483 | 1876-1886 |
