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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 | Ralph Blair# | .5769 | 2031 | |
| 7 | Chris Collins | .5769 | 2015 | |
| 9 | Alvin Baldwin | .5714 | 2020 | |
| 10 | Geoffrey Jellineck | .5600 | 2021 | |
| 10 | Dennis Mayne# | .5600 | 2033 | |
| 12 | Jeff Wade | .5476 | 2019 | |
| 13 | Tsuneyo Nakagawa# | .5455 | 2032 | |
| 13 | Oliver North# | .5455 | 2027 | |
| 15 | Mike Bergeron* | .5385 | 2019 | |
| 16 | Tim McCreary | .5366 | 2017 | |
| 17 | Adam Kerr# | .5357 | 2026 | |
| 17 | Ka-fei Bi# | .5357 | 2031 | |
| 19 | Leslie Whitney | .5333 | 2018 | |
| 20 | George Soucy# | .5313 | 2026 | |
| 21 | Nick Holmes* | .5303 | 2027 | |
| 22 | Millard Pearce | .5278 | 2016 | |
| 23 | Artie Woodard# | .5238 | 2032 | |
| 23 | Joaquín Jaramillo | .5238 | 2027 | |
| 25 | John Oakes# | .5217 | 2027 | |
| 25 | Tomás Gonzáles | .5217 | 2019 | |
| 25 | Esteban Ruíz# | .5217 | 2028 | |
| 28 | Tom Klein | .5185 | 2018 | |
| 29 | Stanley Comiskey# | .5172 | 2030 | |
| 30 | Donald Latulippe# | .5152 | 2026 | |
| 30 | Kiyonobu Yamasaki# | .5152 | 2022 | |
| 30 | Floyd Green | .5152 | 2026 | |
| 30 | António Barbarro | .5152 | 2028 | |
| 30 | Joe Young | .5152 | 2027 | |
| 35 | Shunso Fukuda# | .5111 | 2031 | |
| 36 | Jim Crawford | .5098 | 2017 | |
| 37 | Claude Morin | .5072 | 2018 | |
| 38 | Abalendu Manglorkar# | .5070 | 2022 | |
| 39 | Jeremy Evans | .5000 | 2019 | |
| 39 | Steve McGowan | .5000 | 2028 | |
| 39 | James Riley | .5000 | 2021 | |
| 39 | Lúcio Nájera# | .5000 | 2025 | |
| 39 | Eric McSwan | .5000 | 2014 | |
| 39 | Jim Crawford | .5000 | 2014 | |
| 39 | Jorge Rosas | .5000 | 2018 | |
| 39 | Todd McCarthy# | .5000 | 2026 | |
| 39 | Shunso Fukuda# | .5000 | 2032 | |
| 39 | Kiyonobu Yamasaki# | .5000 | 2023 | |
| 39 | Millard Pearce | .5000 | 2024 | |
| 39 | Matt Winters# | .5000 | 2025 | |
| 39 | Cristián Rivera | .5000 | 2021 | |
| 52 | Ka-fei Bi# | .4930 | 2032 | |
| 53 | Jong-min Kim Jr.# | .4894 | 2028 | |
| 54 | Yasushi Kato | .4889 | 2028 | |
| 55 | David Lewis | .4878 | 2025 | |
| 56 | Tom Becker* | .4868 | 2013 | |
| 57 | Shadi bin Mufeed# | .4861 | 2033 | |
| 58 | Bill Nelson | .4848 | 2021 | |
| 59 | Anthony Cadenhead# | .4839 | 2033 | |
| 60 | Curt Hall | .4828 | 2023 | |
| 61 | Frank Lewis | .4815 | 2026 | |
| 61 | Tracy Ashton | .4815 | 2023 | |
| 61 | Steve Frend* | .4815 | 2012 | |
| 64 | Tim Shields* | .4810 | 2018 | |
| 65 | Marty Silver | .4792 | 2017 | |
| 65 | Tim McCreary | .4792 | 2018 | |
| 67 | Tim Shields* | .4783 | 2019 | |
| 67 | Tony Oglethorpe | .4783 | 2018 | |
| 67 | Lai-hsiang Xiu# | .4783 | 2025 | |
| 67 | Joseph Mitchell | .4783 | 2021 | |
| 71 | Jorge Rivera# | .4773 | 2032 | |
| 72 | Apupa Vuppula# | .4762 | 2032 | |
| 72 | Kojuro Ine# | .4762 | 2032 | |
| 72 | Scott O'Connor | .4762 | 2027 | |
| 75 | Brad Thomas | .4754 | 2020 | |
| 76 | Javier Trujillo# | .4750 | 2033 | |
| 77 | Oliver North# | .4737 | 2019 | |
| 78 | Artie Woodard# | .4722 | 2028 | |
| 79 | Tom Lampley# | .4706 | 2030 | |
| 79 | Ángel Vázquez# | .4706 | 2033 | |
| 81 | Kelsey Sherrill# | .4694 | 2032 | |
| 81 | Tim Raines | .4694 | 2023 | |
| 83 | Mal Rivers | .4688 | 2026 | |
| 84 | Ángel Vázquez# | .4679 | 2026 | |
| 85 | Matt Winters# | .4677 | 2026 | |
| 86 | Shannon Craft# | .4667 | 2029 | |
| 87 | Jong-min Kim Jr.# | .4655 | 2029 | |
| 88 | Wilson Flores | .4643 | 2026 | |
| 88 | Conceição Loff | .4643 | 2020 | |
| 90 | Mike Bergeron* | .4630 | 2020 | |
| 90 | Mike Davis# | .4630 | 2027 | |
| 92 | Tim Shields* | .4625 | 2021 | |
| 92 | Colin St. John | .4625 | 2014 | |
| 94 | Lu-po-teh Cheung | .4615 | 2024 | |
| 94 | Pedro Gómez | .4615 | 2023 | |
| 94 | Tom Lampley# | .4615 | 2026 | |
| 97 | Kiyonobu Yamasaki# | .4595 | 2033 | |
| 98 | Dustin McMahon# | .4583 | 2032 | |
| 98 | Rafael Campos# | .4583 | 2032 | |
| 98 | Chris Collins | .4583 | 2018 |
