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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Fred Roberts* | .4251 | 1919-1932 | |
| 2 | Shigemasa Sato* | .4107 | 1926-1943 | |
| 3 | Rafael Martínez* | .4005 | 1927-1943 | |
| 4 | Wayne Cramphorn | .3969 | 1927-1933 | |
| 5 | Jeremy Wilson | .3928 | 1936-1947 | |
| 6 | Bill Collier* | .3903 | 1926-1942 | |
| 7 | Herb Jackson* | .3851 | 1911-1927 | |
| 8 | Howard Wagner | .3773 | 1935-1942 | |
| 9 | Christian Cook# | .3704 | 1978-1990 | |
| 10 | Lance Kaiser | .3694 | 1943-1956 | |
| 11 | Carlos Helásquez | .3690 | 1964-1983 | |
| 12 | Tony Daley | .3666 | 1961-1978 | |
| 13 | José Bonilla | .3665 | 1930-1936 | |
| 14 | Jason Henry | .3657 | 1971-1987 | |
| 15 | Ari Frece | .3637 | 1932-1952 | |
| 15 | Wop Ouwens# | .3637 | 1976-1991 | |
| 17 | Vincente Dávila | .3516 | 1965-1979 | |
| 18 | Jorge Durán | .3513 | 1914-1925 | |
| 19 | Callum Bourke | .3469 | 1954-1974 | |
| 20 | Arnim Wille | .3416 | 1960-1977 | |
| 21 | Juan Carlos Rodríguez | .3387 | 1918-1930 | |
| 22 | Joe Walker | .3351 | 1977-1982 | |
| 23 | Elmer Young | .3345 | 1978-1988 | |
| 24 | Mike Rúbio | .3331 | 1955-1967 | |
| 25 | Germán Hernández | .3327 | 1955-1965 | |
| 26 | Ben MacGruder | .3316 | 1911-1918 | |
| 27 | Jesús García | .3295 | 1914-1922 | |
| 28 | Radislav Mares | .3267 | 1975-1983 | |
| 29 | Ricardo Ortíz | .3252 | 1959-1970 | |
| 30 | Steven Powell# | .3151 | 1982-1989 | |
| 31 | Raúl Martínez | .3121 | 1969-1980 | |
| 32 | Gary Lee | .3049 | 1939-1951 | |
| 33 | Charlie Butler | .3027 | 1977-1987 |
