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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Fedor Beck# | .5192 | 1958 | |
| 2 | Franklin Wouters# | .5036 | 1956 | |
| 3 | Franklin Wouters# | .4978 | 1957 | |
| 4 | Dan Duncan# | .4917 | 1953 | |
| 5 | Jan Danielsson# | .4899 | 1953 | |
| 6 | Nick Gilgore# | .4860 | 1958 | |
| 7 | Josh Horlick# | .4842 | 1955 | |
| 8 | Giulio Pisa# | .4601 | 1956 | |
| 9 | Bryan Peden# | .4483 | 1955 | |
| 10 | Jared Johnston# | .4474 | 1958 | |
| 11 | Jan Danielsson# | .4425 | 1952 | |
| 12 | Tim Pond# | .4286 | 1955 | |
| 12 | Sean Sulima# | .4286 | 1958 | |
| 14 | Féilim Graham# | .4270 | 1957 | |
| 15 | Alexis Colas# | .4239 | 1957 | |
| 16 | Georges Cariou# | .4160 | 1958 | |
| 16 | Geoffrey Claassen# | .4160 | 1956 | |
| 18 | Byung-sik Han# | .4130 | 1958 | |
| 19 | Josh Horlick# | .4050 | 1954 | |
| 20 | Yoichi Ito# | .4032 | 1956 | |
| 21 | Bill Levine# | .3891 | 1955 | |
| 22 | Phil White# | .3864 | 1956 | |
| 23 | Phil Anderson | .3773 | 1952 | |
| 24 | Ramiro Salas# | .3711 | 1957 | |
| 25 | Fergus Harris# | .3647 | 1952 | |
| 26 | Branislav Kordic# | .2857 | 1954 |
