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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Pedro Oporta | .4879 | 1939-1942 | |
| 2 | Hadde Ippel | .4844 | 1950-1953 | |
| 3 | Lorenzo Mercado | .4830 | 1941-1944 | |
| 4 | Erik Melton | .4781 | 1935-1938 | |
| 5 | Ed St. John | .4755 | 1937-1940 | |
| 6 | Frank Bailey | .4651 | 1943-1946 | |
| 7 | Clement Powers | .4606 | 1937-1940 | |
| 8 | Riley Wells | .4581 | 1937-1940 | |
| 9 | Sotan Wakabayashi | .4565 | 1942-1945 | |
| 10 | Héctor Alemán | .4559 | 1953-1956 | |
| 11 | Travis Brown | .4547 | 1947-1950 | |
| 12 | Ambrose Land | .4506 | 1939-1942 | |
| 13 | Raúl Rúbio | .4471 | 1935-1938 | |
| 14 | Cong Hua | .4470 | 1938-1941 | |
| 15 | Dan Dethridge | .4434 | 1933-1936 | |
| 16 | Mark Warren | .4209 | 1940-1943 | |
| 17 | Francisco Córdova | .4198 | 1938-1941 | |
| 18 | Héctor Palomarez# | .4035 | 1976-1979 | |
| 19 | Ian Grooms# | .4019 | 1971-1974 | |
| 20 | Armando Hernández | .4009 | 1926-1930 | |
| 21 | Liam Burgess# | .3923 | 1978-1981 | |
| 22 | Mauro Morales | .3879 | 1942-1945 | |
| 23 | Eric Combs# | .3868 | 1978-1981 | |
| 24 | Merrill Wilkerson | .3765 | 1976-1979 | |
| 25 | Bartolo Rosas | .3731 | 1955-1958 | |
| 26 | Jeff Cherry# | .3711 | 1976-1979 | |
| 27 | Javier Alarcon# | .3329 | 1983-1986 | |
| 28 | Christian Wilson | .3299 | 1957-1960 | |
| 29 | Jesse Wiggins | .3232 | 1911-1915 |
