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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Oswald Knapp# | .5974 | 1954-1959 | |
| 2 | Serge Poulet# | .4743 | 1955-1956 | |
| 3 | Eric Line# | .4336 | 1952-1956 | |
| 4 | Vitezslav Silhavy | .4286 | 1952-1953 | |
| 5 | Roland Dickerson# | .4213 | 1953-1959 |
