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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | George Hatfield | .4830 | 1940-1943 | |
| 2 | Chris Godfrey | .4784 | 1944-1947 | |
| 3 | Tim Murdock | .4649 | 1928-1931 | |
| 4 | Fernando Colón | .4581 | 1938-1941 | |
| 5 | Pedro Ramírez | .4506 | 1943-1946 | |
| 6 | Kevin Keller | .4371 | 1936-1939 | |
| 7 | Juan Piña | .4364 | 1944-1947 | |
| 8 | Miguel Angel Torres | .4331 | 1940-1943 | |
| 9 | Francisco Maldonado | .4287 | 1930-1933 | |
| 10 | Gary Lazarus | .4215 | 1926-1929 | |
| 11 | Clayton Meyer | .4181 | 1933-1936 | |
| 12 | Maximino Albertoni | .4093 | 1935-1938 | |
| 13 | José Galló | .3940 | 1925-1929 |
