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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 | Kieran Hansen# | .512 | 2039-2041 | |
| 4 | Adrián Gómez# | .500 | 2028-2041 | |
| 4 | Tomás Gonzáles | .500 | 2017-2021 | |
| 4 | Bill Taylor | .500 | 2022-2023 | |
| 7 | Noel Ballard* | .493 | 2017-2031 | |
| 7 | Sadatake Abe# | .493 | 2039-2040 | |
| 9 | José Rodríguez | .483 | 2018-2020 | |
| 10 | Jason Nicholson | .477 | 2015-2019 | |
| 11 | Obidiah Lewis# | .473 | 2028-2039 | |
| 11 | Pedro Willis | .473 | 2015-2022 | |
| 13 | George Valentine | .472 | 2015-2020 | |
| 14 | Michael Malloy# | .471 | 2027-2041 | |
| 15 | Billy Dotson# | .469 | 2030-2041 | |
| 16 | Spencer Powell# | .468 | 2034-2041 | |
| 17 | Melvin Castro | .460 | 2019-2030 | |
| 17 | Miguel Gazivoda | .460 | 2030-2037 | |
| 19 | Shimei Miura# | .456 | 2033-2041 | |
| 20 | Joey Coco# | .453 | 2034-2040 | |
| 21 | Tomás Muinos# | .452 | 2036-2041 | |
| 21 | Yoshihito Samurakami | .452 | 2030-2033 | |
| 23 | Preston Witt | .450 | 2031-2038 | |
| 23 | Johan Kroening# | .450 | 2032-2041 | |
| 23 | Chris Nelson | .450 | 2018-2022 | |
| 23 | Ed Anderson | .450 | 2015-2025 | |
| 27 | Bryan Manning | .449 | 2018-2020 | |
| 28 | Ron Bascombe | .447 | 2017-2026 | |
| 29 | Pancho García | .444 | 2017-2022 | |
| 29 | José Peña | .444 | 2016-2020 | |
| 29 | Chad Armstrong* | .444 | 2016-2027 | |
| 32 | Ben Ross | .443 | 2015-2022 | |
| 32 | Manoo Satyavrat# | .443 | 2027-2041 | |
| 34 | Thomas Dunlap | .442 | 2017-2020 | |
| 35 | Michael Neely | .440 | 2016-2029 | |
| 36 | Eddie Flynn | .439 | 2022-2032 | |
| 36 | Mal Bussard | .439 | 2017-2020 | |
| 38 | Luis Muñóz | .437 | 2018-2026 | |
| 39 | Kumanosuke Abe | .436 | 2024-2032 | |
| 39 | Steve Ingram | .436 | 2016-2029 | |
| 41 | Qing-nian Zexian# | .435 | 2038-2040 | |
| 42 | Jeff Walsh | .434 | 2015-2021 | |
| 43 | Harry Fuller | .433 | 2016-2026 | |
| 43 | Francisco González | .433 | 2016-2019 | |
| 45 | Carlos Ortega | .432 | 2018-2024 | |
| 46 | Lionel McCloud | .430 | 2028-2035 | |
| 47 | Lawrence Bell | .429 | 2018-2023 | |
| 47 | César Durán | .429 | 2019-2023 | |
| 47 | Marcus Shill# | .429 | 2037-2041 | |
| 50 | Tadayoshi Watanabe# | .427 | 2034-2040 | |
| 51 | Jake Hutchinson | .426 | 2019-2026 | |
| 52 | Tony Dyer* | .425 | 2016-2025 | |
| 52 | Carlos Vera | .425 | 2015-2021 | |
| 52 | Matt Dunlap# | .425 | 2040-2041 | |
| 55 | Brian O'Brian | .423 | 2015-2022 | |
| 56 | Omar Gutiérrez | .422 | 2017-2017 | |
| 56 | Fa-hsien Tze# | .422 | 2038-2041 | |
| 56 | Robbie Roach | .422 | 2016-2028 | |
| 56 | Donald Thompson | .422 | 2016-2025 | |
| 60 | Glyn Bolasky# | .420 | 2029-2040 | |
| 61 | Guillermo Montoya | .419 | 2016-2021 | |
| 61 | José Rodríguez | .419 | 2028-2040 | |
| 63 | Kenzaburo Hori | .418 | 2019-2027 | |
| 64 | Bill Chambers* | .417 | 2016-2018 | |
| 65 | Urs van Munster# | .416 | 2030-2040 | |
| 66 | Jonas van Claveren# | .415 | 2035-2041 | |
| 66 | Luis Rodríguez | .415 | 2015-2023 | |
| 66 | Menno van de Vlugt | .415 | 2026-2033 | |
| 66 | Thom Wilcox* | .415 | 2017-2027 | |
| 66 | Juan González | .415 | 2022-2027 | |
| 66 | Joram Nelen | .415 | 2023-2029 | |
| 66 | Sergio Vásquez# | .415 | 2033-2039 | |
| 73 | Carlos Rodríguez | .414 | 2017-2018 | |
| 73 | Jonathan Cook | .414 | 2019-2030 | |
| 75 | Craig Woods# | .413 | 2036-2040 | |
| 76 | Tim Barnes | .412 | 2017-2026 | |
| 76 | Victor Adams | .412 | 2023-2032 | |
| 76 | John Aston | .412 | 2024-2028 | |
| 76 | Mike Silver* | .412 | 2015-2023 | |
| 80 | Jorge Barrios | .411 | 2025-2035 | |
| 80 | José Corona | .411 | 2033-2038 | |
| 80 | John Ennis# | .411 | 2027-2034 | |
| 83 | Tamasaburo Kato | .408 | 2030-2037 | |
| 83 | Gerald Kaufman | .408 | 2028-2034 | |
| 83 | Shun Komatsu# | .408 | 2036-2040 | |
| 86 | Casey Cavell | .407 | 2026-2036 | |
| 86 | Pablo Marrero | .407 | 2027-2032 | |
| 86 | Ray Sears* | .407 | 2017-2027 | |
| 86 | Brad Elmore | .407 | 2015-2025 | |
| 90 | Yuji Ine | .405 | 2020-2026 | |
| 90 | Rodrigo Lugo | .405 | 2025-2032 | |
| 90 | Bartolo Soto# | .405 | 2032-2039 | |
| 90 | José Valéncia | .405 | 2029-2038 | |
| 90 | Sinclair van Kooten | .405 | 2017-2026 | |
| 90 | Kunimichi Chikafuji | .405 | 2024-2033 | |
| 90 | Dallas Ihde# | .405 | 2035-2040 | |
| 90 | Trent Kershaw | .405 | 2015-2022 | |
| 90 | Mark Ross | .405 | 2015-2017 | |
| 99 | Jeff Lee | .404 | 2021-2022 | |
| 99 | Steve Hinkle | .404 | 2019-2021 |
