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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Lorenzo Castro# | .5778 | 2018-2019 | |
| 2 | Jake Hunt# | .5333 | 2015-2021 | |
| 3 | Kiyoemon Kawano# | .5263 | 2026-2028 | |
| 4 | Joe Burke# | .5000 | 2025-2027 | |
| 4 | Jay Faulkner | .5000 | 2015-2016 | |
| 6 | John Oakes# | .4938 | 2024-2026 | |
| 7 | Derek Reaveley | .4925 | 2019-2023 | |
| 8 | Kiyoemon Aoki | .4886 | 2017-2023 | |
| 9 | José Rivera | .4848 | 2015-2025 | |
| 10 | Atmo Subadio# | .4839 | 2026-2027 | |
| 11 | Arturo Velásquez# | .4681 | 2026-2027 | |
| 11 | Michael Warren# | .4681 | 2016-2020 | |
| 13 | Kiyonobu Yamasaki# | .4655 | 2017-2018 | |
| 14 | Jeffrey Wright | .4651 | 2016-2022 | |
| 15 | Ken Paul# | .4590 | 2028-2028 | |
| 16 | Don Strickland | .4583 | 2019-2019 | |
| 17 | Nick McBride | .4545 | 2016-2016 | |
| 18 | Shane Meade | .4524 | 2020-2021 | |
| 19 | Taro Omori# | .4483 | 2017-2021 | |
| 20 | Tae-kyun Hong# | .4464 | 2023-2026 | |
| 21 | Hsui-chen Shui# | .4462 | 2024-2027 | |
| 22 | Carlos Beltrán | .4444 | 2019-2025 | |
| 22 | Garin Renzenbrink# | .4444 | 2026-2028 | |
| 24 | Felipe Castillo | .4419 | 2019-2023 | |
| 24 | Ryan Marshall | .4419 | 2017-2017 | |
| 26 | Jesús Valenzuela# | .4375 | 2024-2025 | |
| 26 | Kenshin Yamashita# | .4375 | 2020-2023 | |
| 28 | Lu-po-teh Cheung# | .4340 | 2019-2019 | |
| 29 | Yoshitoki Tanaka | .4327 | 2020-2025 | |
| 30 | Wladimir Esser# | .4318 | 2028-2028 | |
| 31 | Herman Wolf# | .4314 | 2028-2028 | |
| 32 | Federico Cavatta# | .4310 | 2023-2024 | |
| 33 | Kohei Matsumoto# | .4301 | 2024-2027 | |
| 34 | Yuan-zhang Pi# | .4265 | 2025-2027 | |
| 35 | Gianpaolo Salimbeni | .4262 | 2021-2022 | |
| 36 | Keith Morris# | .4259 | 2012-2024 | |
| 37 | Michael Cook | .4255 | 2018-2023 | |
| 38 | Ben Frazier | .4237 | 2014-2019 | |
| 38 | Takanori Higashi | .4237 | 2013-2013 | |
| 40 | Tetsu Araki# | .4235 | 2022-2027 | |
| 41 | Chandler Eckard# | .4231 | 2024-2027 | |
| 41 | Pedro Ornelas | .4231 | 2019-2020 | |
| 43 | Ramón Ruíz | .4225 | 2016-2021 | |
| 44 | Jerry Gibbs | .4222 | 2017-2026 | |
| 45 | Matt Conway# | .4186 | 2017-2019 | |
| 45 | Guillermo Luna# | .4186 | 2020-2027 | |
| 47 | Dermot Currall# | .4182 | 2027-2028 | |
| 48 | Tom Hanson# | .4167 | 2026-2027 | |
| 48 | Juan Moreno# | .4167 | 2018-2028 | |
| 50 | Kris Gary | .4146 | 2018-2019 | |
| 51 | Ambhoruha Vijayanath# | .4130 | 2020-2028 | |
| 52 | Shoji Ando# | .4127 | 2027-2028 | |
| 53 | Abid Alamdar# | .4107 | 2024-2024 | |
| 54 | Will Steele | .4105 | 2019-2023 | |
| 55 | Orlando Barajas# | .4091 | 2025-2028 | |
| 55 | Daniel Dorsey | .4091 | 2015-2018 | |
| 55 | Jason Hill | .4091 | 2021-2024 | |
| 55 | Júlio Ruíz# | .4091 | 2022-2026 | |
| 55 | Dean Smith | .4091 | 2019-2026 | |
| 55 | Yasujiro Uchiyama | .4091 | 2018-2021 | |
| 61 | Aziz Sanchez# | .4051 | 2021-2027 | |
| 62 | Ken Prince# | .4035 | 2028-2028 | |
| 62 | Kuemon Yasuda | .4035 | 2015-2019 | |
| 64 | Jude Growcott# | .4032 | 2026-2028 | |
| 65 | Michael Gilliland | .4015 | 2019-2022 | |
| 66 | Takuji Hakui | .4000 | 2013-2021 | |
| 66 | Baber Khan# | .4000 | 2026-2028 | |
| 66 | Yasukazu Kiyomizu | .4000 | 2017-2021 | |
| 69 | Juan Guerrero | .3968 | 2020-2025 | |
| 70 | Oliver Pinches | .3946 | 2022-2025 | |
| 71 | Oscar Jones# | .3925 | 2020-2022 | |
| 72 | Rafael Pérez | .3913 | 2017-2018 | |
| 73 | Steve Wagner# | .3906 | 2015-2016 | |
| 74 | Kieran Hurd# | .3896 | 2024-2026 | |
| 74 | Wyatt Lewis | .3896 | 2018-2023 | |
| 76 | Raúl Guzmán | .3895 | 2018-2024 | |
| 77 | Shi-kai Tsu# | .3889 | 2027-2028 | |
| 78 | Danny Griggs# | .3878 | 2019-2023 | |
| 79 | Greg May | .3866 | 2019-2026 | |
| 80 | Garrett Bennett | .3864 | 2016-2017 | |
| 81 | Jonathan Barnes | .3860 | 2013-2014 | |
| 81 | Scott O'Connor# | .3860 | 2020-2028 | |
| 83 | Shawn Cummins# | .3850 | 2016-2027 | |
| 84 | Peter Armstrong | .3846 | 2019-2024 | |
| 85 | Tom Wyatt | .3836 | 2016-2022 | |
| 86 | Edgar Smith# | .3833 | 2017-2018 | |
| 87 | Michel Gérard# | .3830 | 2015-2027 | |
| 87 | Tsurayuki Hasegawa# | .3830 | 2024-2028 | |
| 89 | Billy Daig | .3824 | 2016-2025 | |
| 90 | Ashton Latham | .3814 | 2014-2021 | |
| 91 | Nathan Sewell# | .3800 | 2025-2028 | |
| 92 | Jeff Barraclough | .3778 | 2022-2024 | |
| 92 | Si-dao Chi# | .3778 | 2026-2028 | |
| 94 | Júlio Rodríguez | .3774 | 2019-2024 | |
| 95 | Manuel Baldivía | .3750 | 2022-2024 | |
| 95 | Ronald Bilderbeek# | .3750 | 2023-2027 | |
| 95 | Bo Bing# | .3750 | 2022-2025 | |
| 98 | Dung Vu-Pham# | .3725 | 2023-2027 | |
| 99 | Kendrick Lane | .3704 | 2015-2021 | |
| 100 | Ryan Kirby | .3696 | 2015-2017 |
