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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Dan Moriarty# | .4833 | 1899 | |
| 2 | Joe Delahanty# | .4802 | 1899 | |
| 3 | Tom Osborn# | .4652 | 1899 | |
| 4 | Ray Kearney# | .4390 | 1899 | |
| 5 | Rube Tynan# | .4298 | 1899 | |
| 6 | Horace Scofield# | .4262 | 1899 | |
| 7 | Art Tierney# | .3873 | 1899 |
