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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Ted Walker* | .4913 | 2013 | |
| 2 | Ad Vreke* | .4898 | 2051 | |
| 3 | Neville Eastin* | .4869 | 2016 | |
| 4 | José Guzmán | .4822 | 2025 | |
| 5 | Ad Vreke* | .4820 | 2053 | |
| 6 | Matt Goff* | .4785 | 2018 | |
| 7 | Matt Goff* | .4780 | 2017 | |
| 8 | Neville Eastin* | .4778 | 2015 | |
| 8 | Duviel Zaldivar | .4778 | 2063 | |
| 10 | David Espaillat | .4759 | 2068 | |
| 11 | Ted Walker* | .4750 | 2007 | |
| 12 | Brad Stapp | .4741 | 2037 | |
| 13 | Robert Hall* | .4727 | 2010 | |
| 14 | Robert Hall* | .4722 | 2011 | |
| 15 | Cooper Langlinais* | .4707 | 1999 | |
| 16 | Cooper Langlinais* | .4701 | 1993 | |
| 17 | Taroemon Yamada* | .4693 | 2037 | |
| 18 | Zounes Kamuzu | .4671 | 2061 | |
| 18 | Ad Vreke* | .4671 | 2049 | |
| 20 | Kieran Kennedy | .4660 | 2024 | |
| 21 | Brad Stapp | .4658 | 2040 | |
| 22 | Matty Hrinko# | .4650 | 2077 | |
| 23 | Rob Stafford | .4640 | 2017 | |
| 24 | Mario Sandoval | .4628 | 2006 | |
| 25 | Matt Goff* | .4626 | 2016 | |
| 26 | Bobby Aguinaga# | .4623 | 2081 | |
| 27 | Ted Walker* | .4621 | 2009 | |
| 28 | Tohru Asano | .4615 | 2066 | |
| 29 | Adam Baggaley* | .4603 | 2015 | |
| 29 | Matt Goff* | .4603 | 2014 | |
| 31 | Roberto Torres* | .4602 | 2022 | |
| 32 | Duviel Zaldivar | .4594 | 2061 | |
| 33 | Kenzie Dingwell* | .4585 | 2058 | |
| 34 | Billy Morf# | .4583 | 2080 | |
| 35 | Luis Maldonado* | .4575 | 2005 | |
| 36 | Ad Vreke* | .4571 | 2052 | |
| 37 | Drier Price* | .4570 | 2048 | |
| 38 | Israel Nájera* | .4566 | 2031 | |
| 39 | Anthony Sackett* | .4560 | 2007 | |
| 40 | Jacob Testaverde# | .4553 | 2081 | |
| 41 | Luis Maldonado* | .4550 | 2004 | |
| 41 | Carlo Igartua | .4550 | 2056 | |
| 43 | Bill Christensen | .4548 | 2019 | |
| 44 | Kieran van Buskirk | .4547 | 2048 | |
| 45 | Frederick Kopecky* | .4536 | 2007 | |
| 45 | Brad Stapp | .4536 | 2043 | |
| 45 | Ad Vreke* | .4536 | 2057 | |
| 48 | Gus O'Maginn | .4533 | 2002 | |
| 49 | Greg Arrington* | .4516 | 1992 | |
| 50 | Neville Eastin* | .4515 | 2017 | |
| 51 | Paul Payne | .4503 | 2014 | |
| 51 | Ad Vreke* | .4503 | 2054 | |
| 53 | Brad Stapp | .4499 | 2042 | |
| 54 | Tyson Bender | .4497 | 2018 | |
| 55 | George Baker* | .4495 | 2004 | |
| 56 | Kieran van Buskirk | .4489 | 2050 | |
| 57 | Bill Christensen | .4483 | 2021 | |
| 58 | Jesus Leyva | .4482 | 2062 | |
| 59 | Ricardo Rivera* | .4481 | 2041 | |
| 59 | José Rivera* | .4481 | 2056 | |
| 61 | Miguel Duarte* | .4477 | 2006 | |
| 61 | Sancho Riquenes* | .4477 | 2055 | |
| 63 | Aaron Westfall | .4473 | 2020 | |
| 64 | Ben Bute | .4472 | 2042 | |
| 65 | Anthony Sackett* | .4463 | 2005 | |
| 66 | Kieran Kennedy | .4462 | 2022 | |
| 66 | Israel Nájera* | .4462 | 2029 | |
| 68 | Elmo Englehardt | .4461 | 2017 | |
| 69 | Robert Hall* | .4460 | 2012 | |
| 70 | Dax Schneider | .4459 | 2014 | |
| 71 | Kieran van Buskirk | .4457 | 2052 | |
| 72 | Juan De La Garza | .4455 | 2014 | |
| 73 | Robert Hall* | .4447 | 2009 | |
| 74 | Pedro Vega* | .4446 | 2009 | |
| 75 | Pierre Émond | .4444 | 2055 | |
| 75 | Adrián Zúñiga* | .4444 | 2027 | |
| 77 | Graham LeClair* | .4438 | 2025 | |
| 78 | Adam Baggaley* | .4435 | 2013 | |
| 79 | Jesús Luzuriaga* | .4434 | 2014 | |
| 79 | Ramón Espinoza | .4434 | 2004 | |
| 81 | Bill Christensen | .4433 | 2020 | |
| 81 | Juan De La Garza | .4433 | 2017 | |
| 83 | Sancho Riquenes* | .4431 | 2057 | |
| 83 | Pedro Vega* | .4431 | 2018 | |
| 85 | Ad Vreke* | .4428 | 2050 | |
| 86 | Albert Cranberri* | .4424 | 2008 | |
| 87 | Manuel Rivas | .4419 | 2021 | |
| 87 | Júlio Avilés* | .4419 | 2034 | |
| 87 | Hiroshi Hirayama | .4419 | 2059 | |
| 90 | Ramón Espinoza | .4417 | 2006 | |
| 91 | Adam Baggaley* | .4415 | 2012 | |
| 91 | Eric Fountain | .4415 | 2019 | |
| 91 | Júlio Avilés* | .4415 | 2032 | |
| 94 | Ted Walker* | .4411 | 2008 | |
| 95 | Mario Sandoval | .4410 | 2009 | |
| 96 | Shigenobu Shimamoto# | .4409 | 2074 | |
| 97 | Ricardo Rivera* | .4402 | 2039 | |
| 98 | Júlio Avilés* | .4401 | 2028 | |
| 99 | Ted Walker* | .4400 | 2015 | |
| 100 | Billy Morf# | .4399 | 2081 |
