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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Bill McTavish | .4709 | 1943-1947 | |
| 2 | Fernando Barrón | .4545 | 1939-1942 | |
| 3 | António Hidalgo | .4433 | 1938-1941 | |
| 4 | António Morales | .4331 | 1928-1932 | |
| 5 | Wilber Gregg | .4261 | 1943-1946 | |
| 6 | Pedro Aguirre | .4062 | 1944-1948 | |
| 7 | Alberto Pacheco# | .3626 | 1979-1982 | |
| 8 | Jon Fraser | .3226 | 1960-1964 | |
| 9 | Alfonso García# | .3181 | 1987-1991 |
