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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Bob Bailey# | .5786 | 1890 | |
| 2 | Jack Cornwell# | .5478 | 1890 | |
| 3 | Oliver Cabot# | .4162 | 1890 | |
| 4 | Vic Jaeger# | .3706 | 1890 | |
| 5 | Walt Tuttle# | .3341 | 1890 | |
| 6 | Otis Boone# | .2911 | 1890 |
