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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jon Maas# | .5938 | 1955-1957 | |
| 2 | Karsten van Rooij# | .5909 | 1957-1957 | |
| 3 | Rudjer Nacuk | .5897 | 1955-1955 | |
| 4 | Jerrod Francis# | .5135 | 1957-1957 | |
| 5 | Jurrie Verbeek# | .5000 | 1955-1955 | |
| 6 | Harvey Keller# | .4762 | 1955-1957 | |
| 7 | Max Herrmann# | .4737 | 1955-1955 | |
| 8 | Matthew Brown# | .4667 | 1957-1957 | |
| 9 | Tristan Rio# | .4655 | 1955-1957 | |
| 10 | Jorge Cruz# | .4615 | 1955-1957 | |
| 10 | Nermin Solevic# | .4615 | 1957-1957 | |
| 12 | Chris Sharkey# | .4333 | 1955-1957 | |
| 13 | Haruyoshi Chikasuye# | .4000 | 1955-1955 | |
| 14 | Yue-jiu Dung# | .3939 | 1955-1957 | |
| 15 | Randy Broomhead# | .3846 | 1957-1957 | |
| 16 | Lan-fang Dee# | .3750 | 1955-1955 | |
| 16 | Ju-yi Shi# | .3750 | 1957-1957 | |
| 18 | Angelo Alvarez# | .3704 | 1955-1955 | |
| 18 | Mazakazu Nakajima# | .3704 | 1955-1957 | |
| 20 | Manny Castillo# | .3514 | 1955-1957 | |
| 21 | Justin Hernandez# | .3333 | 1957-1957 | |
| 21 | Bobby Valazquez# | .3333 | 1955-1955 | |
| 23 | Shura Vasileisky# | .3226 | 1955-1955 | |
| 24 | Kung Lung# | .2800 | 1955-1957 | |
| 25 | Illarion Okerblom# | .2727 | 1955-1957 | |
| 26 | Hector Martinez# | .2653 | 1955-1957 | |
| 27 | Willie Quiros# | .1875 | 1957-1957 | |
| 28 | Jeigif Atyasov# | .1250 | 1957-1957 |
