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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Clark Owens# | .5909 | 2021 | |
| 2 | Willie Kirkham# | .5833 | 2023 | |
| 3 | Chao-yang Shui | .5769 | 2002 | |
| 4 | Johnny McCoskey | .5652 | 2000 | |
| 5 | Luis Soto | .5556 | 2007 | |
| 6 | Johnny Ortega* | .5439 | 2011 | |
| 7 | Alberto Ojeda* | .5385 | 2007 | |
| 8 | Ryan Forsythe# | .5357 | 2022 | |
| 9 | Alberto Ojeda* | .5319 | 2013 | |
| 9 | Pablo Vegas* | .5319 | 2006 | |
| 11 | Mike Barriga | .5294 | 2002 | |
| 12 | Josh Woodson | .5263 | 2008 | |
| 13 | Andrew DeGroff | .5238 | 2004 | |
| 13 | Ricky Villarreal | .5238 | 2006 | |
| 13 | Ben Manser | .5238 | 2003 | |
| 13 | Yasuzo Yamaoka | .5238 | 2008 | |
| 13 | Javier Saiz | .5238 | 2003 | |
| 13 | Jose Torres | .5238 | 2001 | |
| 19 | Eric Daniel# | .5227 | 2022 | |
| 20 | Brian LaFever | .5217 | 2007 | |
| 20 | Richard Green | .5217 | 2010 | |
| 20 | Pablo Vegas* | .5217 | 2002 | |
| 20 | John Jackson | .5217 | 2006 | |
| 20 | Johnny Ortega* | .5217 | 2012 | |
| 25 | Pedro Ramos | .5200 | 2012 | |
| 26 | Mitsuaki Sakaguchi | .5161 | 2010 | |
| 27 | Johnny Ortega* | .5152 | 2009 | |
| 28 | Heath Sherlock# | .5102 | 2021 | |
| 29 | Dave DeSanto# | .5000 | 2019 | |
| 29 | Carlos Escalera* | .5000 | 2000 | |
| 29 | Bobby Tapia# | .5000 | 2008 | |
| 29 | Johnny Ortega* | .5000 | 2006 | |
| 29 | Emmanuel Haigler | .5000 | 2007 | |
| 29 | Luis Pompa | .5000 | 2016 | |
| 29 | Caleb Strouse | .5000 | 2003 | |
| 29 | Austin Compton# | .5000 | 2015 | |
| 37 | Paul Pittman# | .4930 | 2020 | |
| 38 | Bob Johnson | .4918 | 2009 | |
| 39 | Brett Byrnes | .4889 | 2009 | |
| 40 | David Domina# | .4884 | 2020 | |
| 41 | Matt O'Brien | .4878 | 2003 | |
| 42 | Aaron Jalbert# | .4872 | 2021 | |
| 43 | Dan Rodriguez | .4857 | 2006 | |
| 44 | Pablo Vegas* | .4853 | 2005 | |
| 45 | Miguel Nunez | .4800 | 2004 | |
| 45 | Carlos Escalera* | .4800 | 2003 | |
| 45 | Andy Rodriguez | .4800 | 2001 | |
| 45 | Dan Walker | .4800 | 2007 | |
| 45 | Miles Hayes | .4800 | 2011 | |
| 50 | Mike Townsend# | .4792 | 2018 | |
| 51 | Leo Orozco# | .4789 | 2020 | |
| 52 | Jason Moore | .4762 | 2018 | |
| 52 | Jon Hager | .4762 | 2015 | |
| 52 | Juan Garcia# | .4762 | 2014 | |
| 55 | Ethan Robertson | .4688 | 2001 | |
| 55 | Taylor Lee | .4688 | 2000 | |
| 57 | Willie Granados | .4667 | 2005 | |
| 58 | Ruben Alamo# | .4651 | 2023 | |
| 59 | Rogelio Sanchez | .4615 | 2013 | |
| 59 | Bill Garcia | .4615 | 2011 | |
| 59 | Fernando Rodriguez | .4615 | 2012 | |
| 62 | Jonathan Ellis# | .4583 | 2015 | |
| 62 | Johnny Ortega* | .4583 | 2002 | |
| 64 | Jimmy Jones# | .4565 | 2018 | |
| 64 | Miguel Arias | .4565 | 2008 | |
| 66 | Aaron Kay | .4561 | 2007 | |
| 67 | Dan Walker | .4545 | 2012 | |
| 67 | Pat Grayson# | .4545 | 2020 | |
| 67 | Jonathan Ellis# | .4545 | 2010 | |
| 67 | Harry Guertin | .4545 | 2009 | |
| 67 | Miguel Meza | .4545 | 2013 | |
| 72 | Tyler Jordan# | .4528 | 2018 | |
| 73 | Adam Ziarnik | .4490 | 2003 | |
| 73 | Matt Vickers | .4490 | 2003 | |
| 75 | Jose Figueroa | .4478 | 2015 | |
| 76 | Brian Long | .4474 | 2001 | |
| 76 | Joaquin Bermudez | .4474 | 2013 | |
| 78 | Yasuzo Yamaoka | .4468 | 2011 | |
| 78 | Israel Salazar | .4468 | 2010 | |
| 78 | Johnny Ortega* | .4468 | 2001 | |
| 81 | Danny Cruz | .4444 | 2007 | |
| 81 | Jorge Padilla | .4444 | 2013 | |
| 81 | Luciano Camossa | .4444 | 2003 | |
| 84 | Mike Barriga | .4430 | 2006 | |
| 85 | Keith Brosch# | .4429 | 2021 | |
| 86 | Mike Kern | .4400 | 2000 | |
| 86 | Trevor Sanchez | .4400 | 2016 | |
| 86 | Daniel Jackson | .4400 | 2004 | |
| 86 | Ben Barbone# | .4400 | 2022 | |
| 90 | Jonathan Ashley | .4394 | 2014 | |
| 91 | Carlos Escalera* | .4384 | 2005 | |
| 92 | Danny Pierce# | .4375 | 2021 | |
| 92 | Alberto Ojeda* | .4375 | 2008 | |
| 94 | Chris Wolf | .4359 | 2009 | |
| 94 | Aaron Jalbert# | .4359 | 2023 | |
| 94 | Victor Gonzalez# | .4359 | 2011 | |
| 97 | Brent Hansen# | .4348 | 2023 | |
| 97 | Clark Owens# | .4348 | 2020 | |
| 97 | David Domina# | .4348 | 2021 | |
| 97 | Jose Valverde# | .4348 | 2022 |
