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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Jeff Thomas | .3978 | 1983-1990 | |
| 2 | Eddie Brandt | .3895 | 1966-1974 | |
| 3 | Joshua McGrath# | .3893 | 1983-1989 | |
| 4 | Chris Carey | .3809 | 1949-1956 | |
| 5 | Jerry Thompson | .3762 | 1912-1916 | |
| 6 | Juan Vázquez# | .3734 | 1984-1991 | |
| 7 | Romeo Brancati | .3675 | 1960-1965 | |
| 8 | Bryant Thomas | .3635 | 1945-1953 | |
| 9 | Arvid van Leeuwen | .3622 | 1936-1943 | |
| 10 | Paul Cox | .3601 | 1970-1978 | |
| 11 | Matt Logan | .3563 | 1975-1979 | |
| 12 | Alex Hammond | .3511 | 1913-1926 | |
| 13 | Teruo Takata | .3480 | 1950-1955 | |
| 14 | Hunter Dominey | .3468 | 1976-1987 | |
| 15 | Clay Anderson | .3384 | 1956-1961 | |
| 16 | Tim Cox | .3286 | 1957-1961 | |
| 17 | Stan Rainey | .3225 | 1911-1916 |
