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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Aaron Conley | .4817 | 1935-1938 | |
| 2 | Jesse Warren | .4707 | 1941-1944 | |
| 3 | Luke Peters | .4679 | 1933-1936 | |
| 4 | Barry Hoffman | .4440 | 1938-1941 | |
| 5 | Pedro Cruz | .4418 | 1941-1944 | |
| 6 | Len Fanner# | .4286 | 1980-1983 | |
| 7 | Brian Pope | .4280 | 1934-1937 | |
| 8 | Juan Ramírez | .4201 | 1964-1967 | |
| 9 | Pend Tora# | .4122 | 1984-1987 | |
| 10 | Javier Martínez | .4099 | 1966-1969 | |
| 11 | Roger Martin | .4065 | 1958-1961 | |
| 12 | Domingo Espinoza | .3921 | 1966-1969 | |
| 13 | William Mayer# | .3896 | 1979-1982 | |
| 14 | Gonzalo Ramos | .3783 | 1969-1973 | |
| 15 | Curt Pope | .3763 | 1978-1981 | |
| 16 | Clark Barton# | .3647 | 1977-1980 | |
| 16 | Wallace Kramer# | .3647 | 1983-1986 | |
| 18 | António Flores# | .3604 | 1976-1979 | |
| 19 | Tomás Nava | .3596 | 1980-1983 | |
| 20 | Jorge Santos# | .3521 | 1976-1979 | |
| 21 | Travis Farley# | .3472 | 1980-1984 | |
| 22 | John Edwards# | .3444 | 1976-1979 | |
| 23 | Jorge Román | .3416 | 1970-1974 | |
| 24 | Donald Frye# | .3396 | 1984-1987 | |
| 25 | Diego Bertoni# | .3391 | 1980-1983 | |
| 26 | Ryan Jeffries# | .3095 | 1980-1983 |
