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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Guillermo Romero | .5385 | 2016-2020 | |
| 2 | Qing-nian Zexian | .5376 | 2038-2052 | |
| 3 | John Downing* | .5222 | 2015-2034 | |
| 4 | Lautaro Lacasa# | .5217 | 2042-2054 | |
| 5 | Luis Ibáñez# | .5091 | 2052-2054 | |
| 6 | Tomás Gonzáles | .5000 | 2017-2021 | |
| 6 | Adrián Gómez | .5000 | 2028-2044 | |
| 6 | Bill Taylor | .5000 | 2022-2023 | |
| 9 | Noel Ballard* | .4933 | 2017-2031 | |
| 10 | Sadatake Abe | .4925 | 2039-2040 | |
| 11 | José Rodríguez | .4828 | 2018-2020 | |
| 12 | Jason Nicholson | .4773 | 2015-2019 | |
| 13 | Pedro Willis | .4730 | 2015-2022 | |
| 14 | George Valentine | .4722 | 2015-2020 | |
| 15 | Michael Malloy | .4706 | 2027-2045 | |
| 16 | Obidiah Lewis | .4632 | 2028-2042 | |
| 17 | Melvin Castro* | .4603 | 2019-2030 | |
| 18 | Miguel Gazivoda | .4600 | 2030-2037 | |
| 19 | Jonas van Claveren | .4570 | 2035-2051 | |
| 20 | Joey Coco | .4533 | 2034-2047 | |
| 21 | Tomás Muinos | .4524 | 2036-2041 | |
| 21 | Yoshihito Samurakami | .4524 | 2030-2033 | |
| 23 | Will Roach# | .4516 | 2048-2049 | |
| 24 | Mike Ríos | .4514 | 2041-2049 | |
| 25 | Preston Witt | .4505 | 2031-2038 | |
| 26 | Shu-yaan Hor# | .4500 | 2054-2056 | |
| 26 | Johan Kroening | .4500 | 2032-2041 | |
| 26 | Chris Nelson | .4500 | 2018-2022 | |
| 29 | Ed Anderson | .4495 | 2015-2025 | |
| 30 | Bryan Manning | .4492 | 2018-2020 | |
| 31 | Shimei Miura | .4478 | 2033-2044 | |
| 32 | Billy Dotson | .4474 | 2030-2044 | |
| 33 | Ron Bascombe | .4468 | 2017-2026 | |
| 33 | Adam Clements | .4468 | 2038-2043 | |
| 35 | Pancho García | .4444 | 2017-2022 | |
| 35 | José Peña | .4444 | 2016-2020 | |
| 35 | Toto Wolff# | .4444 | 2052-2056 | |
| 38 | Chad Armstrong* | .4437 | 2016-2027 | |
| 39 | Ben Ross | .4430 | 2015-2022 | |
| 40 | Thomas Dunlap | .4419 | 2017-2020 | |
| 41 | Michael Neely | .4400 | 2016-2029 | |
| 42 | Dhataki Pummy# | .4394 | 2051-2055 | |
| 43 | Benjamin Bays | .4390 | 2045-2050 | |
| 43 | Eddie Flynn | .4390 | 2022-2032 | |
| 45 | Mal Bussard | .4386 | 2017-2020 | |
| 46 | Cheong-hun Park# | .4384 | 2052-2056 | |
| 47 | Luis Muñóz | .4366 | 2018-2026 | |
| 48 | Kumanosuke Abe | .4364 | 2024-2032 | |
| 49 | Thomas Zachary# | .4353 | 2046-2053 | |
| 50 | Jorge Beguer# | .4341 | 2051-2053 | |
| 51 | Celestino Canova# | .4340 | 2052-2056 | |
| 52 | Jeff Walsh | .4336 | 2015-2021 | |
| 53 | Harry Fuller | .4333 | 2016-2026 | |
| 53 | Francisco González | .4333 | 2016-2019 | |
| 55 | Marcus Shill | .4324 | 2037-2048 | |
| 56 | Carlos Ortega | .4318 | 2018-2024 | |
| 57 | Joe Madden# | .4304 | 2053-2056 | |
| 58 | Lionel McCloud | .4298 | 2028-2035 | |
| 59 | Lawrence Bell | .4286 | 2018-2023 | |
| 59 | César Durán | .4286 | 2019-2023 | |
| 61 | Carlos Rivera# | .4273 | 2046-2055 | |
| 62 | Jake Hutchinson | .4262 | 2019-2026 | |
| 62 | Tadayoshi Watanabe | .4262 | 2034-2042 | |
| 64 | Tony Dyer* | .4250 | 2016-2025 | |
| 64 | Carlos Vera | .4250 | 2015-2021 | |
| 66 | Cor van Capelleveen# | .4239 | 2049-2056 | |
| 67 | Brian O'Brian | .4231 | 2015-2022 | |
| 68 | Omar Gutiérrez | .4222 | 2017-2017 | |
| 68 | Jesús Vargas | .4222 | 2029-2043 | |
| 70 | Robbie Roach | .4219 | 2016-2028 | |
| 71 | Donald Thompson | .4216 | 2016-2025 | |
| 72 | Glyn Bolasky | .4203 | 2029-2040 | |
| 73 | Guillermo Montoya | .4189 | 2016-2021 | |
| 73 | José Rodríguez | .4189 | 2028-2040 | |
| 75 | Kenzaburo Hori | .4182 | 2019-2027 | |
| 76 | Bill Chambers* | .4167 | 2016-2018 | |
| 76 | Jorge Costa# | .4167 | 2052-2056 | |
| 78 | Urs van Munster | .4159 | 2030-2040 | |
| 79 | Eric MacKichan | .4151 | 2047-2055 | |
| 79 | Luis Rodríguez | .4151 | 2015-2023 | |
| 79 | Menno van de Vlugt | .4151 | 2026-2033 | |
| 79 | Thom Wilcox* | .4151 | 2017-2027 | |
| 83 | Juan González | .4146 | 2022-2027 | |
| 83 | Eugene Hollands# | .4146 | 2050-2054 | |
| 83 | Tetsu Matsumoto | .4146 | 2041-2054 | |
| 83 | Jorge Napolez# | .4146 | 2045-2054 | |
| 83 | Joram Nelen | .4146 | 2023-2029 | |
| 83 | Sergio Vásquez | .4146 | 2033-2039 | |
| 89 | Carlos Rodríguez | .4143 | 2017-2018 | |
| 90 | Jonathan Cook | .4138 | 2019-2030 | |
| 91 | Dídac Nores# | .4133 | 2046-2056 | |
| 92 | Tim Stinson | .4130 | 2033-2042 | |
| 93 | Chris P. Bacon | .4127 | 2052-2054 | |
| 94 | Tim Barnes | .4125 | 2017-2026 | |
| 94 | Manoo Satyavrat | .4125 | 2027-2043 | |
| 96 | Victor Adams | .4120 | 2023-2032 | |
| 97 | John Aston | .4118 | 2024-2028 | |
| 97 | Glen Keetley# | .4118 | 2052-2056 | |
| 97 | Mike Silver* | .4118 | 2015-2023 | |
| 100 | Jorge Barrios | .4115 | 2025-2035 |
