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| Single-Season Walks per 9IP Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Walks per 9IP | IP | Year | Career Leaderboard |
| 1. | J.J. Cobb | 0.43 | 210.0 | 2012 | |
| 2. | J.J. Cobb | 0.44 | 248.0 | 2011 | |
| 3. | Silverio Osuna | 0.49 | 254.7 | 2027 | |
| 4. | Chad Schmidt | 0.51 | 227.7 | 2022 | |
| 5. | Charles Lewandowski | 0.52 | 207.0 | 2020 | |
| 6. | James Alexander | 0.54 | 184.3 | 2020 | |
| 7. | James Alexander | 0.54 | 250.3 | 2016 | |
| 8. | Ralph Ives | 0.55 | 260.3 | 2022 | |
| 9. | Chris Curcio | 0.56 | 226.3 | 2011 | |
| 10. | Armand Banuelos | 0.56 | 209.7 | 2001 | |
| 11. | Mark Trowers | 0.56 | 240.7 | 2018 | |
| 12. | Dennis Wright * | 0.57 | 252.7 | 2005 | |
| 13. | Gilbert Giglio | 0.58 | 218.7 | 2022 | |
| 14. | Kevin Smith | 0.61 | 309.0 | 2029 | |
| 15. | Dennis Wright * | 0.62 | 276.3 | 2003 | |
| 16. | Chad Schmidt | 0.62 | 275.3 | 2027 | |
| 17. | J.J. Cobb | 0.63 | 227.7 | 2013 | |
| 18. | Chad Schmidt | 0.64 | 226.0 | 2019 | |
| 19. | Chad Schmidt | 0.65 | 292.3 | 2029 | |
| 20. | Barney Albuerne | 0.65 | 167.0 | 2028 | |
| 21. | Ralph Ives | 0.65 | 263.0 | 2021 | |
| 22. | Ryan Turner * | 0.65 | 247.3 | 2010 | |
| 23. | Chad Schmidt | 0.67 | 228.0 | 2017 | |
| 24. | James Alexander | 0.68 | 253.0 | 2018 | |
| 25. | Mark Trowers | 0.68 | 264.0 | 2016 | |
| 26. | James Alexander | 0.70 | 232.0 | 2019 | |
| 27. | Chad Schmidt | 0.70 | 244.0 | 2024 | |
| 28. | Charles Lewandowski | 0.70 | 205.3 | 2021 | |
| 29. | Kelvin Palen | 0.70 | 269.0 | 2003 | |
| 30. | Jeff Waldrep | 0.71 | 203.3 | 2016 | |
| 31. | Artur Sax | 0.72 | 239.0 | 2016 | |
| 32. | Matthew Bedard | 0.72 | 237.3 | 2011 | |
| 33. | Ralph Ives | 0.72 | 249.0 | 2024 | |
| 34. | Dennis Wright * | 0.72 | 286.0 | 2008 | |
| 35. | Chris Curcio | 0.72 | 211.3 | 2012 | |
| 36. | Ryan Turner * | 0.73 | 234.7 | 2011 | |
| 37. | Artur Sax | 0.74 | 207.0 | 2014 | |
| 38. | Barney Albuerne | 0.74 | 231.3 | 2019 | |
| 39. | Dennis Wright * | 0.74 | 315.0 | 2007 | |
| 40. | Kevin Smith | 0.74 | 205.7 | 2020 | |
| 41. | Chris Beamish | 0.74 | 217.7 | 2027 | |
| 42. | Dennis Wright * | 0.75 | 241.0 | 2010 | |
| 43. | Matthew Bedard | 0.75 | 204.7 | 2013 | |
| 44. | Dennis Wright * | 0.75 | 227.0 | 2006 | |
| 45. | Gilbert Giglio | 0.76 | 178.7 | 2021 | |
| 46. | Tobias Barrientos | 0.76 | 190.0 | 2007 | |
| 47. | Artur Sax | 0.76 | 201.7 | 2022 | |
| 48. | Barney Albuerne | 0.77 | 176.3 | 2025 | |
| 49. | James Alexander | 0.77 | 198.0 | 2021 | |
| 50. | Chris Curcio | 0.77 | 232.7 | 2010 | |
| 51. | Ralph Ives | 0.77 | 255.7 | 2025 | |
| 52. | Leo Cleland * | 0.77 | 220.7 | 2013 | |
| 53. | Dennis Wright * | 0.78 | 183.7 | 2001 | |
| 54. | Barney Albuerne | 0.78 | 229.3 | 2021 | |
| 55. | Edward Goffe | 0.79 | 217.0 | 2015 | |
| 56. | Matthew Bedard | 0.79 | 227.0 | 2012 | |
| 57. | Charles Lewandowski | 0.80 | 226.0 | 2022 | |
| 58. | Barney Albuerne | 0.80 | 224.7 | 2020 | |
| 59. | Mark Trowers | 0.81 | 257.0 | 2015 | |
| 60. | Alex Ramirez | 0.82 | 230.3 | 2009 | |
| 61. | Pedro Carrasquillo | 0.82 | 197.3 | 2026 | |
| 62. | Peter Iuvani | 0.83 | 207.0 | 2014 | |
| 63. | Kevin Smith | 0.83 | 272.0 | 2025 | |
| 64. | Chad Schmidt | 0.83 | 217.0 | 2018 | |
| 65. | J.J. Cobb | 0.83 | 270.3 | 2010 | |
| 66. | Jeff Waldrep | 0.84 | 204.7 | 2014 | |
| 67. | Dennis Wright * | 0.84 | 268.7 | 2011 | |
| 68. | Chet McKie | 0.84 | 182.0 | 2016 | |
| 69. | Kevin Smith | 0.85 | 298.0 | 2028 | |
| 70. | Ralph Ives | 0.85 | 265.3 | 2029 | |
| 71. | Mark Trowers | 0.85 | 233.3 | 2017 | |
| 72. | Silverio Osuna | 0.85 | 265.0 | 2023 | |
| 73. | Mark Trowers | 0.85 | 254.0 | 2013 | |
| 74. | Lowell Stang * | 0.85 | 243.0 | 2017 | |
| 75. | Pete Leighburn | 0.85 | 264.0 | 2028 | |
| 76. | Silverio Osuna | 0.86 | 241.7 | 2025 | |
| 77. | Ben Lamela | 0.86 | 241.3 | 2016 | |
| 78. | Ralph Ives | 0.86 | 250.7 | 2027 | |
| 79. | Mark Trowers | 0.86 | 250.0 | 2019 | |
| 80. | James Alexander | 0.87 | 197.0 | 2013 | |
| 81. | Matthew Bedard | 0.87 | 248.3 | 2010 | |
| 82. | Ralph Ives | 0.88 | 255.7 | 2023 | |
| 83. | Jeff Waldrep | 0.88 | 204.0 | 2015 | |
| 84. | Dennis Wright * | 0.89 | 272.7 | 2012 | |
| 85. | Albert Olmos | 0.90 | 210.7 | 2010 | |
| 86. | Chad Schmidt | 0.90 | 280.7 | 2028 | |
| 87. | David Echegaray | 0.90 | 280.3 | 2013 | |
| 88. | Armand Banuelos | 0.90 | 230.0 | 2005 | |
| 89. | James Yim * | 0.90 | 259.7 | 2012 | |
| 90. | Eliseo Cordova | 0.90 | 179.7 | 2012 | |
| 91. | Alex Ramirez | 0.91 | 218.7 | 2010 | |
| 92. | Adrian Pantas | 0.91 | 218.0 | 2021 | |
| 93. | William Bennington | 0.91 | 237.7 | 2010 | |
| 94. | Wayne Sorely | 0.91 | 247.3 | 2027 | |
| 95. | Eliseo Cordova | 0.91 | 197.7 | 2013 | |
| 96. | Kevin Smith | 0.91 | 276.7 | 2026 | |
| 97. | Robert Slack | 0.91 | 246.0 | 2015 | |
| 98. | J.J. Cobb | 0.92 | 225.0 | 2014 | |
| 99. | Armand Banuelos | 0.92 | 264.0 | 2007 | |
| 100. | Dennis Wright * | 0.92 | 272.7 | 2004 |
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