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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Thom Wilcox* | .4551 | 2013-2028 | |
| 2 | Noel Ballard* | .4235 | 2017-2034 | |
| 3 | Tamasaburo Kato* | .3925 | 2021-2037 | |
| 4 | Juan Cabrera | .3565 | 2015-2036 | |
| 5 | Jaime Soto# | .3554 | 2038-2054 | |
| 6 | Ethan Duffy# | .3543 | 2044-2054 | |
| 7 | Xavier Hernández | .3480 | 2026-2039 | |
| 8 | Dídac Nores# | .3474 | 2042-2054 | |
| 9 | Nelson Jaramillo | .3439 | 2029-2043 | |
| 10 | Roland Deschain | .3400 | 2026-2040 | |
| 11 | Ki-tak Im | .3395 | 2024-2036 | |
| 12 | Mario Castillo | .3381 | 2032-2048 | |
| 13 | Max Bortenschlager | .3305 | 2036-2047 | |
| 14 | Terumoto Nakanishi# | .3285 | 2046-2054 | |
| 15 | Bob Heller | .3256 | 2015-2026 | |
| 16 | Datu Lesaca | .3213 | 2034-2047 | |
| 17 | Tim Barnes | .3193 | 2017-2027 | |
| 18 | Juan Neváres# | .3062 | 2043-2054 | |
| 19 | Bernardo Herrera | .2988 | 2019-2035 | |
| 20 | Jorge Trevino | .2973 | 2019-2026 |
