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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Mike Meza# | .5046 | 1954-1959 | |
| 2 | Kjeld Penders# | .5011 | 1952-1955 | |
| 3 | Gregor Kramer# | .4623 | 1956-1959 | |
| 4 | Isaias Alas# | .4511 | 1952-1959 | |
| 5 | Jason Moore# | .4462 | 1952-1957 | |
| 6 | Katsumi Aono# | .4274 | 1952-1955 | |
| 7 | Jose Pena# | .4187 | 1952-1959 | |
| 8 | Jesus Martinez# | .3879 | 1953-1959 | |
| 9 | Bill Miller# | .3640 | 1957-1959 | |
| 10 | Borenko Sainovic# | .3397 | 1954-1958 |
