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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ryusuke Sugihara# | .5091 | 1952-1957 | |
| 2 | Randall Quero# | .5034 | 1956-1957 | |
| 3 | Jesus Gelacio# | .4954 | 1952-1958 | |
| 4 | Serge Poulet# | .4871 | 1957-1959 | |
| 5 | Nicholas Littmann# | .4798 | 1953-1954 | |
| 6 | Paul Morin# | .4655 | 1954-1957 | |
| 7 | Willie Martinez# | .4630 | 1953-1957 | |
| 8 | Ji-man Kong# | .4426 | 1956-1959 | |
| 9 | Billy Connell# | .4368 | 1952-1955 | |
| 10 | Bob Foster# | .4265 | 1953-1956 |
