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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | John Gustafson# | .5115 | 2064 | |
| 2 | Ángel Romero# | .4699 | 2064 | |
| 3 | Stephen Butterell# | .4565 | 2064 | |
| 4 | Emery McDonald# | .4535 | 2064 | |
| 5 | José Hernández# | .4296 | 2064 | |
| 6 | Joe Crane# | .3611 | 2064 | |
| 7 | Ralph Lee# | .3256 | 2064 | |
| 8 | Carlos Mercado# | .3091 | 2064 | |
| 9 | António Ramos# | .2234 | 2064 | |
| 10 | Bill Thomas# | .2051 | 2064 |
