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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Tim Kennedy | .4337 | 1977-1990 | |
| 2 | Anastasio Martínez | .4296 | 1952-1963 | |
| 3 | Darrel Edmonds | .4197 | 1975-1984 | |
| 4 | Dale Mooney# | .4025 | 1982-1991 | |
| 5 | Jason Miner | .3985 | 1962-1976 | |
| 6 | José Hernández# | .3984 | 1982-1991 | |
| 7 | Carlos González | .3897 | 1969-1980 | |
| 8 | Colin Wilkins | .3893 | 1963-1970 | |
| 9 | Luis Hernández | .3861 | 1975-1984 | |
| 10 | José Peña | .3833 | 1937-1946 | |
| 11 | Vincent Jarvis | .3805 | 1964-1978 | |
| 12 | Will Jewell | .3787 | 1952-1959 | |
| 13 | Claudio Moreno | .3751 | 1951-1964 | |
| 14 | Eisaku Chouda | .3712 | 1930-1938 | |
| 15 | Aberto Cambria | .3573 | 1915-1925 |
