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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jon Olson# | .4615 | 1952-1959 | |
| 2 | Bryan Cook# | .4179 | 1952-1959 | |
| 3 | Caesar Friis-Knutzen# | .3932 | 1952-1958 | |
| 4 | Matt MacGillivray# | .3862 | 1952-1959 | |
| 5 | Giovannino Bragantini# | .3689 | 1955-1959 | |
| 6 | Anthony Brunt# | .3656 | 1952-1959 | |
| 7 | Katsumi Aono# | .3638 | 1956-1959 | |
| 8 | Octavio Muro# | .3570 | 1952-1959 | |
| 9 | Gunter Weber# | .3485 | 1953-1956 | |
| 10 | Bob Ramos# | .3448 | 1954-1959 | |
| 11 | Jordan Mejia# | .3442 | 1952-1958 | |
| 12 | Pascal Boccanera# | .3322 | 1952-1959 |
