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| Career Post-Season Walks per 9IP Leaderboard | |
| * - Indicates Hall of Fame Bold - Indicates active player |
| Rank | Player | Walks per 9IP | IP | Years | Single Season Leaderboard |
| 1. | James Nelson | 0.35 | 26.0 | 2006-2014 | |
| 2. | Pete Leighburn | 0.41 | 22.0 | 2027-2028 | |
| 3. | John Cobham | 0.42 | 21.3 | 2017-2025 | |
| 4. | Gilbert Giglio | 0.46 | 59.3 | 2018-2026 | |
| 5. | Artur Sax | 0.62 | 116.3 | 2016-2020 | |
| 6. | Donald Granger * | 0.78 | 23.0 | 2004-2013 | |
| 7. | Larry Burkholder | 0.79 | 80.0 | 2012-2023 | |
| 8. | Carmelo Zarzuela | 0.83 | 21.7 | 2021-2025 | |
| 9. | Kelvin Palen | 0.90 | 70.0 | 2004-2006 | |
| 10. | Michael Welch | 0.90 | 50.0 | 2000-2017 | |
| 11. | Ivan Banabila | 0.92 | 39.3 | 2010-2021 | |
| 12. | Dennis Wright * | 0.98 | 64.3 | 2004-2006 | |
| 13. | James Alexander | 0.98 | 146.3 | 2014-2024 | |
| 14. | Tyrell Silvera | 0.99 | 27.3 | 2000-2001 | |
| 15. | Herc Columbie | 1.01 | 26.7 | 2028-2029 | |
| Chris Curcio | 1.01 | 26.7 | 2010-2014 | ||
| 17. | Terminator Huseby | 1.03 | 26.3 | 2025-2029 | |
| 18. | Mark Trowers | 1.03 | 70.0 | 2017-2025 | |
| 19. | Thomas Burleson | 1.07 | 25.3 | 2011-2019 | |
| 20. | Tony Kirkland | 1.08 | 25.0 | 2018-2020 | |
| 21. | Andrew Albury | 1.11 | 81.3 | 2004-2013 | |
| 22. | Lowell Stang * | 1.13 | 104.0 | 2010-2018 | |
| 23. | Mohammad Kemmer | 1.14 | 39.6 | 2003-2013 | |
| 24. | J.J. Cobb | 1.14 | 102.7 | 2011-2014 | |
| 25. | Leo Cleland * | 1.17 | 246.3 | 2006-2014 | |
| 26. | Ralph Ives | 1.20 | 269.7 | 2019-2029 | |
| 27. | Armand Banuelos | 1.23 | 139.3 | 2000-2011 | |
| 28. | Chet McKie | 1.23 | 29.3 | 2014-2018 | |
| 29. | Ben Lamela | 1.23 | 263.0 | 2009-2022 | |
| 30. | Xavier Josephs | 1.25 | 57.7 | 2007-2014 | |
| 31. | Michael Wilmot | 1.27 | 21.3 | 2013-2013 | |
| 32. | Justin Calvillo | 1.27 | 28.3 | 2003-2003 | |
| 33. | Miltons Lost | 1.31 | 41.3 | 2014-2022 | |
| 34. | Charles Lewandowski | 1.31 | 158.3 | 2019-2029 | |
| 35. | Alex Ramirez | 1.31 | 89.3 | 2004-2014 | |
| 36. | Christopher Partida | 1.31 | 34.3 | 2002-2003 | |
| 37. | Leonard Magnan | 1.32 | 27.3 | 2014-2018 | |
| 38. | Mark Torrence | 1.33 | 54.0 | 2005-2009 | |
| 39. | Roberto Villagomez | 1.35 | 33.3 | 2017-2020 | |
| 40. | Edgardo Castillo * | 1.36 | 79.7 | 2004-2015 | |
| 41. | Soutarou Seika | 1.38 | 65.3 | 2021-2023 | |
| 42. | James Yim * | 1.38 | 124.0 | 2005-2012 | |
| 43. | Robby Butler | 1.38 | 52.0 | 2000-2002 | |
| 44. | Ryan Turner * | 1.41 | 288.0 | 2002-2021 | |
| 45. | Thomas Showers * | 1.42 | 82.3 | 2000-2009 | |
| 46. | Kelly Giuliani | 1.42 | 25.3 | 2002-2004 | |
| 47. | Roy Ferrer | 1.42 | 44.3 | 2015-2028 | |
| 48. | Keenan Brochu | 1.44 | 31.3 | 2000-2003 | |
| 49. | Xalbador Laguna | 1.46 | 67.7 | 2020-2029 | |
| 50. | Samuel Bylee | 1.48 | 24.3 | 2010-2019 |
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