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| Career Post-Season On-Base Pct Leaderboard | |
| * - Indicates Hall of Fame Bold - Indicates active player |
| Rank | Player | On-Base Pct | PA | Years | Single Season Leaderboard |
| 1. | Brandon Hollingshead | .4750 | 40 | 2000-2000 | |
| 2. | Eric Algarin | .4667 | 106 | 2003-2012 | |
| 3. | Rafael Pedroza | .4611 | 180 | 2000-2007 | |
| 4. | Mauricio Decosta | .4419 | 87 | 2002-2011 | |
| 5. | Valentin Serna | .4362 | 95 | 2024-2029 | |
| 6. | Jose Decambra | .4219 | 65 | 2012-2016 | |
| 7. | James Hendricks | .4194 | 124 | 2002-2006 | |
| 8. | Mark Edgin | .4186 | 43 | 2000-2001 | |
| 9. | Mack Findler | .4167 | 72 | 2016-2019 | |
| 10. | Alfred Cazares | .4146 | 41 | 2003-2006 | |
| 11. | Santo Tedesco | .4133 | 392 | 2021-2029 | |
| 12. | Richard Ruffner | .4130 | 92 | 2002-2003 | |
| 13. | Donnie Loftin | .4098 | 61 | 2021-2025 | |
| 14. | Ramon Morelli | .4091 | 66 | 2002-2002 | |
| 15. | Bob Jahn | .4082 | 98 | 2017-2020 | |
| 16. | Ron Guinan | .4061 | 293 | 2021-2028 | |
| 17. | Mark Delia * | .4054 | 598 | 2004-2016 | |
| 18. | Alex Mingus | .4048 | 42 | 2016-2021 | |
| 19. | Larry Sears | .4014 | 426 | 2019-2029 | |
| 20. | Cliff Butter | .4000 | 396 | 2017-2029 | |
| Tom Galaxy | .4000 | 295 | 2021-2028 | ||
| John Carsswell | .4000 | 50 | 2019-2019 | ||
| 23. | Gene Halpern | .3980 | 299 | 2013-2021 | |
| 24. | Kent Mumford | .3976 | 83 | 2001-2003 | |
| 25. | Cedrick Colon | .3974 | 79 | 2002-2006 | |
| 26. | Andy Ping | .3970 | 331 | 2021-2029 | |
| 27. | Hugo Grimm | .3962 | 54 | 2000-2002 | |
| 28. | Antonio Herrera | .3955 | 134 | 2004-2006 | |
| Tracy Jordan | .3955 | 134 | 2001-2004 | ||
| 30. | Leon Brouwer | .3953 | 43 | 2008-2008 | |
| Oscar Fitzhugh | .3953 | 44 | 2006-2006 | ||
| 32. | Tyson Bacon * | .3919 | 620 | 2000-2020 | |
| 33. | Harley Race | .3919 | 74 | 2000-2005 | |
| 34. | Adam Anderson | .3916 | 144 | 2004-2006 | |
| 35. | John Surette | .3913 | 46 | 2002-2008 | |
| 36. | Richard Willie | .3902 | 205 | 2000-2007 | |
| Bernard Ramos | .3902 | 41 | 2000-2002 | ||
| 38. | Max Cruz | .3894 | 113 | 2003-2010 | |
| 39. | Bill Hawking | .3893 | 149 | 2021-2029 | |
| 40. | Vernon Castanon | .3889 | 127 | 2005-2012 | |
| Matthew Jamieson | .3889 | 72 | 2000-2002 | ||
| 42. | Karl Immell | .3878 | 441 | 2016-2025 | |
| Ben Atencio | .3878 | 49 | 2003-2005 | ||
| 44. | Joel Huertas | .3845 | 489 | 2017-2027 | |
| 45. | Nicholas Deroche | .3819 | 144 | 2000-2004 | |
| 46. | Skipper Cage | .3810 | 168 | 2026-2029 | |
| Bruce Wedge | .3810 | 295 | 2006-2014 | ||
| Jose Abdullah | .3810 | 126 | 2000-2003 | ||
| 49. | Garth Walker | .3796 | 137 | 2022-2029 | |
| 50. | Matt McQuade * | .3793 | 348 | 2003-2018 |
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