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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Iestyn Drewry* | .5843 | 1949-1959 | |
| 2 | Kai Bignold | .5562 | 1940-1957 | |
| 3 | Arturo Vega | .5219 | 1971-1980 | |
| 4 | Gareth Tolley* | .5029 | 1931-1948 | |
| 5 | Cooper Humphrey | .4944 | 1982-1987 | |
| 6 | Sebastian Dumbrill | .4822 | 1933-1947 | |
| 7 | Jorge Muñóz | .4738 | 1933-1947 | |
| 8 | Irfan Luqman# | .4737 | 1983-1990 | |
| 9 | Tom Huerta | .4447 | 1955-1962 | |
| 10 | Alberto Moreno | .4288 | 1944-1957 | |
| 11 | Marcos Magana | .4082 | 1950-1960 | |
| 12 | Jeff Dixon | .4064 | 1933-1950 | |
| 13 | Raphaël Chrétien | .4029 | 1975-1980 | |
| 14 | Dustin Uhl | .3955 | 1962-1972 | |
| 15 | Franz Frankfurter | .3887 | 1931-1947 |
