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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Frank Coleman# | .6129 | 2023 | |
| 2 | Seitaro Maruyama | .6087 | 2025 | |
| 3 | Frank Lewis# | .6071 | 2028 | |
| 4 | George Soucy# | .6061 | 2025 | |
| 5 | Kata Nishikawa# | .6000 | 2021 | |
| 6 | Jim Crawford | .5949 | 2015 | |
| 7 | Chris Collins | .5769 | 2015 | |
| 8 | Alvin Baldwin | .5714 | 2020 | |
| 9 | Geoffrey Jellineck# | .5600 | 2021 | |
| 10 | Jeff Wade | .5476 | 2019 | |
| 11 | Oliver North# | .5455 | 2027 | |
| 12 | Mike Bergeron | .5385 | 2019 | |
| 13 | Tim McCreary# | .5366 | 2017 | |
| 14 | Adam Kerr# | .5357 | 2026 | |
| 15 | Leslie Whitney# | .5333 | 2018 | |
| 16 | George Soucy# | .5313 | 2026 | |
| 17 | Nick Holmes# | .5303 | 2027 | |
| 18 | Millard Pearce# | .5278 | 2016 | |
| 19 | Joaquín Jaramillo# | .5238 | 2027 | |
| 20 | Esteban Ruíz# | .5217 | 2028 | |
| 20 | Tomás Gonzáles# | .5217 | 2019 | |
| 20 | John Oakes# | .5217 | 2027 | |
| 23 | Tom Klein | .5185 | 2018 | |
| 24 | Joe Young# | .5152 | 2027 | |
| 24 | Donald Latulippe# | .5152 | 2026 | |
| 24 | António Barbarro# | .5152 | 2028 | |
| 24 | Floyd Green# | .5152 | 2026 | |
| 24 | Kiyonobu Yamasaki# | .5152 | 2022 | |
| 29 | Jim Crawford | .5098 | 2017 | |
| 30 | Claude Morin# | .5072 | 2018 | |
| 31 | Abalendu Manglorkar# | .5070 | 2022 | |
| 32 | Jorge Rosas | .5000 | 2018 | |
| 32 | Jeremy Evans | .5000 | 2019 | |
| 32 | James Riley | .5000 | 2021 | |
| 32 | Millard Pearce# | .5000 | 2024 | |
| 32 | Lúcio Nájera# | .5000 | 2025 | |
| 32 | Kiyonobu Yamasaki# | .5000 | 2023 | |
| 32 | Matt Winters# | .5000 | 2025 | |
| 32 | Jim Crawford | .5000 | 2014 | |
| 32 | Eric McSwan | .5000 | 2014 | |
| 32 | Steve McGowan# | .5000 | 2028 | |
| 32 | Cristián Rivera# | .5000 | 2021 | |
| 32 | Todd McCarthy# | .5000 | 2026 | |
| 44 | Jong-min Kim Jr.# | .4894 | 2028 | |
| 45 | Yasushi Kato# | .4889 | 2028 | |
| 46 | David Lewis# | .4878 | 2025 | |
| 47 | Tom Becker* | .4868 | 2013 | |
| 48 | Bill Nelson# | .4848 | 2021 | |
| 49 | Curt Hall# | .4828 | 2023 | |
| 50 | Tracy Ashton# | .4815 | 2023 | |
| 50 | Frank Lewis# | .4815 | 2026 | |
| 50 | Steve Frend# | .4815 | 2012 | |
| 53 | Tim Shields | .4810 | 2018 | |
| 54 | Marty Silver | .4792 | 2017 | |
| 54 | Tim McCreary# | .4792 | 2018 | |
| 56 | Joseph Mitchell# | .4783 | 2021 | |
| 56 | Lai-hsiang Xiu# | .4783 | 2025 | |
| 56 | Tim Shields | .4783 | 2019 | |
| 56 | Tony Oglethorpe# | .4783 | 2018 | |
| 60 | Scott O'Connor# | .4762 | 2027 | |
| 61 | Brad Thomas | .4754 | 2020 | |
| 62 | Oliver North# | .4737 | 2019 | |
| 63 | Artie Woodard# | .4722 | 2028 | |
| 64 | Tim Raines# | .4694 | 2023 | |
| 65 | Mal Rivers# | .4688 | 2026 | |
| 66 | Ángel Vázquez# | .4679 | 2026 | |
| 67 | Matt Winters# | .4677 | 2026 | |
| 68 | Conceição Loff# | .4643 | 2020 | |
| 68 | Wilson Flores# | .4643 | 2026 | |
| 70 | Mike Davis# | .4630 | 2027 | |
| 70 | Mike Bergeron | .4630 | 2020 | |
| 72 | Tim Shields | .4625 | 2021 | |
| 72 | Colin St. John | .4625 | 2014 | |
| 74 | Tom Lampley# | .4615 | 2026 | |
| 74 | Lu-po-teh Cheung# | .4615 | 2024 | |
| 74 | Pedro Gómez# | .4615 | 2023 | |
| 77 | Tim Raines# | .4583 | 2027 | |
| 77 | Manuel Ortega | .4583 | 2020 | |
| 77 | Chris Collins | .4583 | 2018 | |
| 80 | Jacob Pitcock | .4571 | 2020 | |
| 81 | Bill McIntyre# | .4561 | 2026 | |
| 82 | Fernando Bautista | .4556 | 2018 | |
| 83 | Octávio García# | .4545 | 2020 | |
| 83 | Jorge Mora# | .4545 | 2020 | |
| 83 | John Cook# | .4545 | 2022 | |
| 83 | Raymond Moor | .4545 | 2015 | |
| 83 | Shadi bin Mufeed# | .4545 | 2027 | |
| 88 | Jesús Cruz# | .4528 | 2019 | |
| 89 | Matt Winters# | .4516 | 2027 | |
| 89 | Lúcio Nájera# | .4516 | 2020 | |
| 91 | Alvin Baldwin | .4512 | 2021 | |
| 92 | Dean Graham# | .4507 | 2021 | |
| 93 | Dominic Owens# | .4500 | 2024 | |
| 93 | Skip Clayton# | .4500 | 2021 | |
| 93 | Jim Crawford | .4500 | 2016 | |
| 96 | Oliver North# | .4483 | 2017 | |
| 97 | Jorge Zamora# | .4464 | 2027 | |
| 98 | Daniel Roberts | .4444 | 2016 | |
| 98 | Nick Robertson# | .4444 | 2021 | |
| 100 | George Soucy# | .4430 | 2028 |
