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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Rick Steward | .6272 | 1950-1953 | |
| 2 | Michael Barlow | .5750 | 1953-1956 | |
| 3 | Richard Rowland | .5388 | 1943-1946 | |
| 4 | Ronald Stewart | .5276 | 1933-1936 | |
| 5 | Pedro Ramos# | .5254 | 1976-1979 | |
| 6 | Mark Richardson | .5202 | 1950-1953 | |
| 7 | David Marino | .5189 | 1950-1953 | |
| 8 | Gene Clifton | .5186 | 1942-1945 | |
| 9 | Ramón Guzmán | .5136 | 1966-1969 | |
| 10 | Doug Reed# | .5085 | 1988-1991 | |
| 11 | Al Maloney | .4748 | 1935-1938 | |
| 12 | Marcos Vargas | .4677 | 1942-1945 | |
| 13 | Edgardo Galló | .4585 | 1926-1929 | |
| 14 | Marc Reed | .4507 | 1966-1969 | |
| 15 | José Barrera | .4459 | 1949-1952 | |
| 16 | Paul Wilson | .4426 | 1941-1944 | |
| 17 | Stan Ivey# | .4302 | 1976-1979 | |
| 18 | Gregg Morgan | .4268 | 1968-1971 | |
| 19 | Germán Taváres | .4038 | 1938-1941 | |
| 20 | Nick Willerton# | .3994 | 1987-1990 | |
| 21 | Weston Hale | .3574 | 1947-1950 |
