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| Career Post-Season OAVG Leaderboard | |
| * - Indicates Hall of Fame Bold - Indicates active player |
| Rank | Player | OAVG | IP | Years | Single Season Leaderboard |
| 1. | Russell Serra | .1184 | 23.0 | 2001-2004 | |
| 2. | Lamar Fox | .1481 | 33.7 | 2014-2021 | |
| 3. | Edgardo Castillo * | .1583 | 79.7 | 2004-2015 | |
| 4. | Alfredo Jurez | .1605 | 23.3 | 2027-2029 | |
| 5. | Micheal McGriff | .1648 | 27.0 | 2004-2011 | |
| 6. | Jewel Brown | .1684 | 27.7 | 2002-2010 | |
| 7. | Amor Aguaijo | .1700 | 27.3 | 2021-2028 | |
| 8. | Leonard Magnan | .1702 | 27.3 | 2014-2018 | |
| 9. | Lee Jarboe | .1724 | 24.3 | 2001-2007 | |
| 10. | James Yim * | .1731 | 124.0 | 2005-2012 | |
| 11. | Pete Leighburn | .1772 | 22.0 | 2027-2028 | |
| 12. | Harry Swint | .1778 | 25.3 | 2003-2003 | |
| 13. | Randall Spates | .1795 | 33.7 | 2007-2015 | |
| 14. | Denny Truman | .1829 | 23.7 | 2023-2029 | |
| 15. | David Evans | .1842 | 22.0 | 2001-2002 | |
| 16. | Deangelo Ramos * | .1898 | 76.0 | 2006-2019 | |
| 17. | Joseph Holland | .1905 | 28.0 | 2006-2020 | |
| 18. | Dmitrij Mitskevich | .1918 | 86.3 | 2002-2005 | |
| 19. | Ringo Russmyer | .1932 | 25.0 | 2008-2008 | |
| 20. | Skip Burns | .1957 | 115.3 | 2010-2019 | |
| 21. | Kyle Nunn | .1963 | 122.0 | 2012-2018 | |
| 22. | John Airth | .1974 | 21.0 | 2020-2025 | |
| 23. | Ryan Turner * | .1992 | 288.0 | 2002-2021 | |
| 24. | Sexto Teruel | .2000 | 42.7 | 2023-2029 | |
| 25. | Pedro Ramos | .2014 | 40.3 | 2002-2002 | |
| 26. | Nigel Cranfield | .2025 | 22.0 | 2023-2027 | |
| 27. | Albert Olmos | .2027 | 20.7 | 2001-2012 | |
| 28. | Joseph Seybert | .2035 | 31.3 | 2003-2003 | |
| 29. | Tony Paz | .2051 | 43.3 | 2001-2011 | |
| 30. | Harry Kirton | .2061 | 89.0 | 2024-2029 | |
| 31. | Clarence McNatt * | .2064 | 245.3 | 2003-2017 | |
| 32. | Thomas Mercier | .2077 | 34.0 | 2012-2018 | |
| 33. | Donte Dasilva | .2079 | 54.3 | 2007-2013 | |
| 34. | Gilbert Giglio | .2081 | 59.3 | 2018-2026 | |
| 35. | Osvaldo Pedraza | .2082 | 92.7 | 2006-2015 | |
| 36. | Kevin Smith | .2088 | 82.0 | 2021-2029 | |
| 37. | Richard Eaker | .2097 | 33.3 | 2000-2002 | |
| 38. | Dennis Couch | .2105 | 79.7 | 2027-2029 | |
| Steven Williams * | .2105 | 29.7 | 2008-2008 | ||
| 40. | Paul Harrington | .2119 | 63.7 | 2002-2006 | |
| 41. | Galon Thrace | .2123 | 90.7 | 2016-2023 | |
| 42. | Kelvin Palen | .2129 | 70.0 | 2004-2006 | |
| 43. | Alvin Anguiano | .2133 | 21.3 | 2000-2004 | |
| 44. | Willie Marshall | .2134 | 45.7 | 2001-2005 | |
| 45. | Thomas Burleson | .2135 | 25.3 | 2011-2019 | |
| 46. | Larry Burkholder | .2136 | 80.0 | 2012-2023 | |
| 47. | Jose Valdovinos | .2136 | 28.0 | 2000-2000 | |
| 48. | Fred Washington | .2138 | 81.3 | 2005-2017 | |
| 49. | Samson Steele * | .2143 | 27.3 | 2000-2002 | |
| 50. | Danny Day | .2150 | 160.7 | 2016-2022 |
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