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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Riza Berisha | .8636 | 1957 | |
| 2 | Sima Zujovic# | .7143 | 1954 | |
| 3 | Vasilii Wolygin# | .6111 | 1957 | |
| 4 | Kalevi Kangas# | .5652 | 1957 | |
| 5 | Immanuil Leschevsky# | .5500 | 1954 | |
| 6 | Clemens Martin# | .5385 | 1957 | |
| 7 | Byron Ward | .5200 | 1957 | |
| 8 | Cibor Zurek# | .5000 | 1954 | |
| 9 | Donato Marciano# | .4800 | 1954 | |
| 10 | Dejan Mihailovic# | .4783 | 1957 | |
| 11 | Vasilii Wolygin# | .4722 | 1954 | |
| 12 | Leonid Tretyakov# | .4583 | 1957 | |
| 12 | Cibor Zurek# | .4583 | 1957 | |
| 14 | Roger Guillet# | .4545 | 1954 | |
| 15 | Pavle Uskokovic# | .4348 | 1957 | |
| 16 | Tuure Meriluoto | .4167 | 1954 | |
| 17 | Ryan Gray# | .3913 | 1954 | |
| 18 | Weiner Stolle# | .3750 | 1954 | |
| 19 | Girolamo Iuliano# | .3333 | 1957 | |
| 20 | Féilim Graham# | .3000 | 1954 | |
| 21 | Roger Guillet# | .2941 | 1957 | |
| 22 | Mario van Dinteren# | .2857 | 1957 | |
| 22 | Huibert van Duren# | .2857 | 1957 | |
| 24 | Arso Babic# | .2400 | 1957 | |
| 25 | Riza Berisha | .2308 | 1954 | |
| 26 | Ryan Gray# | .2083 | 1957 | |
| 27 | Pavle Uskokovic# | .2069 | 1954 | |
| 28 | Huibert van Duren# | .1818 | 1954 | |
| 29 | Mario van Dinteren# | .1739 | 1954 | |
| 30 | Gavrilo Adzovic# | .1613 | 1954 |
