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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Marvin Hamilton# | .5116 | 1988-1988 | |
| 2 | Santeri Vihermaa | .4889 | 1984-1984 | |
| 3 | Wilfried de Kroon# | .3571 | 1980-1988 | |
| 4 | César Echevarría | .3404 | 1976-1980 | |
| 5 | Costanzo Giammona | .3091 | 1972-1976 | |
| 6 | Elliot Danior# | .2400 | 1972-1980 | |
| 7 | Raphaël Tardy | .2031 | 1968-1976 |
