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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Dylan Aston | .5221 | 1934-1937 | |
| 2 | Enrique López | .5019 | 1940-1943 | |
| 3 | Shahnawaz Mirza | .4987 | 1942-1945 | |
| 4 | Aurelio Hernández* | .4911 | 1954-1957 | |
| 5 | Javier Negrete | .4881 | 1957-1960 | |
| 6 | Martin Colbert | .4683 | 1926-1929 | |
| 7 | Matt Crowther | .4599 | 1949-1952 | |
| 8 | António Rivera | .4595 | 1938-1941 | |
| 9 | Steve Lee | .4350 | 1948-1951 | |
| 10 | Arthur Martínez | .4289 | 1939-1942 | |
| 11 | Ed Smith | .4265 | 1967-1970 | |
| 12 | Fred Walker# | .4232 | 1984-1987 | |
| 13 | Dan Estes | .3899 | 1967-1972 |
