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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Ned Flannery# | .5991 | 1899 | |
| 2 | Sam Tilden# | .5812 | 1899 | |
| 3 | Rufus Thomas# | .5634 | 1899 | |
| 4 | Denny McClister# | .5516 | 1899 | |
| 5 | Frank Hunter# | .5412 | 1899 | |
| 6 | Joe Osborn# | .4125 | 1899 | |
| 7 | Walt McGee# | .4058 | 1899 |
