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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Harvey Keller# | 1.0327 | 1957 | |
| 2 | Jon Maas# | .9938 | 1955 | |
| 3 | Rudjer Nacuk | .9810 | 1955 | |
| 4 | Karsten van Rooij# | .9755 | 1957 | |
| 5 | Jerrod Francis# | .9681 | 1957 | |
| 6 | Max Herrmann# | .9337 | 1955 | |
| 7 | Tristan Rio# | .9232 | 1955 | |
| 8 | Jurrie Verbeek# | .8929 | 1955 | |
| 9 | Matthew Brown# | .8606 | 1957 | |
| 10 | Jorge Cruz# | .8408 | 1955 | |
| 11 | Tristan Rio# | .8152 | 1957 | |
| 12 | Justin Hernandez# | .7681 | 1957 | |
| 13 | Mazakazu Nakajima# | .7667 | 1957 | |
| 13 | Chris Sharkey# | .7667 | 1955 | |
| 15 | Nermin Solevic# | .7374 | 1957 | |
| 16 | Yue-jiu Dung# | .7273 | 1957 | |
| 17 | Randy Broomhead# | .7179 | 1957 | |
| 18 | Harvey Keller# | .7163 | 1955 | |
| 19 | Shura Vasileisky# | .7049 | 1955 | |
| 20 | Bobby Valazquez# | .7048 | 1955 | |
| 21 | Angelo Alvarez# | .7037 | 1955 | |
| 22 | Haruyoshi Chikasuye# | .6857 | 1955 | |
| 23 | Manny Castillo# | .6684 | 1957 | |
| 24 | Ju-yi Shi# | .6550 | 1957 | |
| 25 | Lan-fang Dee# | .6321 | 1955 | |
| 26 | Kung Lung# | .5467 | 1955 | |
| 27 | Illarion Okerblom# | .5455 | 1955 | |
| 28 | Hector Martinez# | .5189 | 1957 | |
| 29 | Hector Martinez# | .5106 | 1955 | |
| 30 | Willie Quiros# | .4161 | 1957 | |
| 31 | Jeigif Atyasov# | .4009 | 1957 |
