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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Tony Castaneda# | .5254 | 1957 | |
| 2 | Souhei Takahashi# | .4941 | 1952 | |
| 3 | Federico Calderon# | .4934 | 1956 | |
| 4 | Zülfü Hocazâde# | .4914 | 1952 | |
| 5 | Santeri Saarikoski# | .4807 | 1956 | |
| 6 | James Sprader# | .4716 | 1958 | |
| 7 | Santeri Saarikoski# | .4708 | 1955 | |
| 8 | Brian Nistler# | .4692 | 1954 | |
| 9 | Taylor Gray | .4622 | 1953 | |
| 10 | Santeri Saarikoski# | .4596 | 1954 | |
| 11 | Romain Larue# | .4459 | 1952 | |
| 12 | Jonathan Gautier# | .4444 | 1958 | |
| 13 | Dan Cole# | .4435 | 1957 | |
| 14 | Robby Fritz# | .4353 | 1953 | |
| 15 | Danny Cisneros# | .4303 | 1954 | |
| 16 | Maurice Château# | .4094 | 1955 | |
| 17 | Chris Sullivan# | .4043 | 1955 | |
| 18 | Robby Fritz# | .3980 | 1954 | |
| 19 | Tim Pond# | .3850 | 1956 | |
| 20 | Danny Cisneros# | .3425 | 1958 |
