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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jason Cawston# | .5777 | 1982-1987 | |
| 2 | Kostenka Agatyev# | .5486 | 1980-1988 | |
| 3 | Sergio Bouvard | .4481 | 1941-1950 | |
| 4 | Omer Belt | .4456 | 1953-1960 |
