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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Aaron Conley | .5611 | 1935-1938 | |
| 2 | William Mayer# | .5122 | 1979-1982 | |
| 3 | Len Fanner# | .4788 | 1980-1983 | |
| 4 | Juan Ramírez | .4730 | 1964-1967 | |
| 5 | Pedro Cruz | .4708 | 1941-1944 | |
| 6 | Domingo Espinoza | .4687 | 1966-1969 | |
| 7 | Luke Peters | .4632 | 1933-1936 | |
| 8 | Barry Hoffman | .4573 | 1938-1941 | |
| 9 | Javier Martínez | .4498 | 1966-1969 | |
| 10 | Jesse Warren | .4358 | 1941-1944 | |
| 11 | António Flores# | .4241 | 1976-1979 | |
| 12 | Brian Pope | .4193 | 1934-1937 | |
| 13 | Roger Martin | .4144 | 1958-1961 | |
| 14 | Clark Barton# | .4132 | 1977-1980 | |
| 15 | Pend Tora# | .4101 | 1984-1987 | |
| 16 | Curt Pope | .4031 | 1978-1981 | |
| 17 | Gonzalo Ramos | .3949 | 1969-1973 | |
| 18 | Wallace Kramer# | .3933 | 1983-1986 | |
| 19 | Tomás Nava | .3809 | 1980-1983 | |
| 20 | Travis Farley# | .3768 | 1980-1984 | |
| 21 | Jorge Santos# | .3690 | 1976-1979 | |
| 22 | Diego Bertoni# | .3547 | 1980-1983 | |
| 23 | Jorge Román | .3463 | 1970-1974 | |
| 24 | John Edwards# | .3441 | 1976-1979 | |
| 25 | Donald Frye# | .3087 | 1984-1987 | |
| 26 | Ryan Jeffries# | .2945 | 1980-1983 |
