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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | António Pérez | .4628 | 1977-1987 | |
| 2 | Brian Thomas | .4375 | 1938-1944 | |
| 3 | Hae-nim Kim | .4307 | 1936-1942 | |
| 4 | Ramiro Reynoso# | .4141 | 1978-1990 | |
| 5 | José Rosales | .4040 | 1955-1960 | |
| 6 | Terry Wagner | .3863 | 1961-1965 | |
| 7 | John Law | .3836 | 1976-1983 | |
| 8 | Christian Joyce | .3360 | 1963-1972 | |
| 9 | Víctor Navarro | .3265 | 1959-1969 |
