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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Guillermo Romero | .538 | 2016-2020 | |
| 2 | John Downing* | .522 | 2015-2034 | |
| 3 | Tomás Gonzáles | .500 | 2017-2021 | |
| 3 | Spencer Powell# | .500 | 2034-2037 | |
| 3 | Bill Taylor | .500 | 2022-2023 | |
| 6 | Noel Ballard* | .493 | 2017-2031 | |
| 7 | Sadatake Abe# | .492 | 2039-2039 | |
| 8 | Adrián Gómez# | .487 | 2028-2030 | |
| 9 | Billy Dotson# | .483 | 2030-2037 | |
| 9 | José Rodríguez | .483 | 2018-2020 | |
| 11 | Jason Nicholson | .477 | 2015-2019 | |
| 12 | Obidiah Lewis# | .473 | 2028-2039 | |
| 12 | Pedro Willis | .473 | 2015-2022 | |
| 14 | George Valentine | .472 | 2015-2020 | |
| 15 | Melvin Castro | .460 | 2019-2030 | |
| 15 | Miguel Gazivoda | .460 | 2030-2037 | |
| 15 | Michael Malloy# | .460 | 2027-2037 | |
| 18 | Tadayoshi Watanabe# | .457 | 2034-2039 | |
| 19 | Yoshihito Samurakami | .452 | 2030-2033 | |
| 20 | Preston Witt | .450 | 2031-2038 | |
| 20 | Chris Nelson | .450 | 2018-2022 | |
| 20 | Ed Anderson | .450 | 2015-2025 | |
| 23 | Bryan Manning | .449 | 2018-2020 | |
| 24 | Ron Bascombe | .447 | 2017-2026 | |
| 25 | Tomás Muinos# | .446 | 2036-2039 | |
| 26 | Pancho García | .444 | 2017-2022 | |
| 26 | José Peña | .444 | 2016-2020 | |
| 26 | Chad Armstrong* | .444 | 2016-2027 | |
| 29 | Ben Ross | .443 | 2015-2022 | |
| 30 | Thomas Dunlap | .442 | 2017-2020 | |
| 31 | Joey Coco# | .441 | 2034-2039 | |
| 32 | Michael Neely | .440 | 2016-2029 | |
| 33 | Eddie Flynn | .439 | 2022-2032 | |
| 33 | Mal Bussard | .439 | 2017-2020 | |
| 35 | Luis Muñóz | .437 | 2018-2026 | |
| 36 | Kumanosuke Abe | .436 | 2024-2032 | |
| 36 | Steve Ingram | .436 | 2016-2029 | |
| 38 | Jeff Walsh | .434 | 2015-2021 | |
| 39 | Glyn Bolasky# | .433 | 2029-2039 | |
| 39 | Harry Fuller | .433 | 2016-2026 | |
| 39 | Francisco González | .433 | 2016-2019 | |
| 42 | Carlos Ortega | .432 | 2018-2024 | |
| 43 | Lionel McCloud | .430 | 2028-2035 | |
| 44 | Lawrence Bell | .429 | 2018-2023 | |
| 44 | César Durán | .429 | 2019-2023 | |
| 46 | Jake Hutchinson | .426 | 2019-2026 | |
| 47 | Tony Dyer* | .425 | 2016-2025 | |
| 47 | Carlos Vera | .425 | 2015-2021 | |
| 49 | Brian O'Brian | .423 | 2015-2022 | |
| 49 | Manoo Satyavrat# | .423 | 2027-2038 | |
| 51 | Omar Gutiérrez | .422 | 2017-2017 | |
| 51 | Robbie Roach | .422 | 2016-2028 | |
| 51 | Donald Thompson | .422 | 2016-2025 | |
| 54 | Craig Woods# | .420 | 2036-2038 | |
| 55 | Guillermo Montoya | .419 | 2016-2021 | |
| 55 | José Rodríguez# | .419 | 2028-2039 | |
| 57 | Kenzaburo Hori | .418 | 2019-2027 | |
| 58 | Scott Kerin# | .417 | 2028-2037 | |
| 58 | Bill Chambers* | .417 | 2016-2018 | |
| 60 | Joey Trifone# | .416 | 2031-2039 | |
| 61 | Panas Pletnev# | .415 | 2033-2039 | |
| 61 | Luis Rodríguez | .415 | 2015-2023 | |
| 61 | Menno van de Vlugt | .415 | 2026-2033 | |
| 61 | Thom Wilcox* | .415 | 2017-2027 | |
| 61 | Juan González | .415 | 2022-2027 | |
| 61 | Joram Nelen | .415 | 2023-2029 | |
| 61 | Sergio Vásquez# | .415 | 2033-2039 | |
| 68 | Carlos Rodríguez | .414 | 2017-2018 | |
| 68 | Jonathan Cook | .414 | 2019-2030 | |
| 70 | Tim Barnes | .412 | 2017-2026 | |
| 70 | Victor Adams | .412 | 2023-2032 | |
| 70 | John Aston | .412 | 2024-2028 | |
| 70 | Ben Boston# | .412 | 2037-2039 | |
| 70 | Ramiro Palmeiro# | .412 | 2038-2039 | |
| 70 | Mike Silver* | .412 | 2015-2023 | |
| 76 | Jorge Barrios | .411 | 2025-2035 | |
| 76 | José Corona# | .411 | 2033-2038 | |
| 76 | Kanko Umaba# | .411 | 2034-2036 | |
| 76 | John Ennis# | .411 | 2027-2034 | |
| 80 | Tamasaburo Kato | .408 | 2030-2037 | |
| 80 | Gerald Kaufman | .408 | 2028-2034 | |
| 82 | Casey Cavell | .407 | 2026-2036 | |
| 82 | Pablo Marrero | .407 | 2027-2032 | |
| 82 | Hugh Mungus# | .407 | 2031-2035 | |
| 82 | Ray Sears* | .407 | 2017-2027 | |
| 82 | Brad Elmore | .407 | 2015-2025 | |
| 87 | Yuji Ine | .405 | 2020-2026 | |
| 87 | Rodrigo Lugo | .405 | 2025-2032 | |
| 87 | Bartolo Soto# | .405 | 2032-2039 | |
| 87 | José Valéncia# | .405 | 2029-2038 | |
| 87 | Sinclair van Kooten | .405 | 2017-2026 | |
| 87 | Kunimichi Chikafuji | .405 | 2024-2033 | |
| 87 | Trent Kershaw | .405 | 2015-2022 | |
| 87 | Mark Ross | .405 | 2015-2017 | |
| 95 | Jeff Lee | .404 | 2021-2022 | |
| 95 | Urs van Munster# | .404 | 2030-2039 | |
| 95 | Steve Hinkle | .404 | 2019-2021 | |
| 95 | Manuel Villarreal | .404 | 2015-2018 | |
| 99 | Je-myung Yu# | .403 | 2035-2038 | |
| 99 | Rafael Sánchez# | .403 | 2027-2037 |
