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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OOBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Robert Cook# | .263 | 2021-2033 | |
| 2 | Kagehisa Saikawa# | .266 | 2022-2033 | |
| 3 | Wayne Penfield | .269 | 2020-2029 | |
| 4 | Joe Ward | .270 | 2013-2022 | |
| 5 | Adharma Sughavanam# | .289 | 2024-2033 | |
| 6 | Takeji Ogawa# | .290 | 2026-2033 | |
| 7 | Vincent Vickers# | .297 | 2025-2033 | |
| 8 | Yoshiaga Rin# | .309 | 2024-2032 | |
| 8 | Manuel Sánchez# | .309 | 2024-2033 | |
| 10 | Matsuyo Koda# | .313 | 2031-2033 | |
| 10 | Paul Durden | .313 | 2012-2017 | |
| 12 | John Stroud# | .314 | 2021-2030 | |
| 13 | Mike Sprake | .316 | 2020-2027 | |
| 14 | Yeong-suk Kim# | .319 | 2021-2033 | |
| 15 | Willi Kehr# | .333 | 2030-2032 | |
| 16 | Carlos León# | .335 | 2022-2033 | |
| 17 | Rick Childress# | .343 | 2026-2033 | |
| 18 | Kichibei Ozawa | .351 | 2026-2030 | |
| 19 | Lester Bisdu# | .365 | 2030-2032 | |
| 20 | Alberto Ramírez | .395 | 2018-2026 | |
| 21 | Joe Hurst# | .436 | 2025-2033 |
