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| Single-Season Walks Allowed Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Walks Allowed | IP | Year | Career Leaderboard |
| 1. | Ramon Quintana | 198 | 289.0 | 2004 | |
| 2. | Ramon Quintana | 173 | 244.3 | 2006 | |
| 3. | Ramon Quintana | 169 | 244.0 | 2008 | |
| 4. | Augustine Woolbright | 165 | 257.0 | 2005 | |
| 5. | Ramon Quintana | 162 | 255.7 | 2003 | |
| 6. | Ramon Quintana | 158 | 242.0 | 2007 | |
| 7. | Ramon Quintana | 157 | 211.7 | 2005 | |
| 8. | Philip Linton | 151 | 228.0 | 2006 | |
| 9. | Ramon Cordova | 139 | 234.0 | 2028 | |
| 10. | Augustine Woolbright | 137 | 195.3 | 2006 | |
| 11. | Alfred Marenco | 136 | 242.0 | 2015 | |
| 12. | Owen Brunton | 135 | 189.7 | 2009 | |
| 13. | Owen Brunton | 134 | 208.7 | 2008 | |
| Gene Foxworth | 134 | 248.0 | 2004 | ||
| Skip Burns | 134 | 241.7 | 2004 | ||
| 16. | Augustine Woolbright | 133 | 196.7 | 2004 | |
| 17. | Ronaldo Laguna | 132 | 225.0 | 2026 | |
| 18. | Almonde Garito | 131 | 225.7 | 2018 | |
| 19. | Philip Linton | 130 | 203.0 | 2007 | |
| 20. | Almonde Garito | 129 | 233.7 | 2016 | |
| Walter Piccirillo | 129 | 175.3 | 2016 | ||
| 22. | Hoya Jung | 128 | 245.3 | 2003 | |
| Ronnie Owens | 128 | 251.7 | 2002 | ||
| 24. | Benny Suarez | 126 | 254.3 | 2022 | |
| Simeon Davalos | 126 | 197.3 | 2021 | ||
| Jamie Agee | 126 | 251.3 | 2008 | ||
| Owen Brunton | 126 | 171.7 | 2007 | ||
| Kurtis Johnson | 126 | 270.3 | 2004 | ||
| 29. | Almonde Garito | 124 | 224.7 | 2017 | |
| Richard Hirsh | 124 | 291.0 | 2007 | ||
| Joseph Smartt | 124 | 237.0 | 2005 | ||
| Hoya Jung | 124 | 227.7 | 2005 | ||
| 33. | Simeon Davalos | 123 | 192.0 | 2026 | |
| Walter Piccirillo | 123 | 199.7 | 2017 | ||
| Skip Burns | 123 | 264.0 | 2007 | ||
| 36. | Jeffrey Anderson | 122 | 195.7 | 2028 | |
| Ramon Cordova | 122 | 245.3 | 2018 | ||
| Daniel Henry | 122 | 215.0 | 2014 | ||
| Gene Foxworth | 122 | 277.7 | 2005 | ||
| Robert Jones | 122 | 235.0 | 2005 | ||
| 41. | Keith Davy | 121 | 186.3 | 2029 | |
| Alfred Marenco | 121 | 249.7 | 2013 | ||
| 43. | Christopher Novoa | 120 | 175.3 | 2014 | |
| 44. | Ramon Cordova | 119 | 219.3 | 2029 | |
| William Tinoco | 119 | 246.0 | 2021 | ||
| Luis Castillo | 119 | 162.7 | 2017 | ||
| Gene Foxworth | 119 | 245.7 | 2006 | ||
| Nathan Cramer | 119 | 190.3 | 2005 | ||
| 49. | Hoya Jung | 118 | 260.3 | 2002 | |
| 50. | Jason Orth | 117 | 201.0 | 2029 | |
| Ramon Cordova | 117 | 207.0 | 2026 | ||
| Arthur Cheung | 117 | 194.7 | 2013 | ||
| 53. | Todd Neary | 116 | 236.3 | 2026 | |
| Skip Burns | 116 | 254.7 | 2008 | ||
| 55. | Ramon Cordova | 115 | 220.0 | 2027 | |
| Ramon Cordova | 115 | 215.0 | 2025 | ||
| Owen Brunton | 115 | 185.3 | 2010 | ||
| Jesus Aviles | 115 | 238.3 | 2003 | ||
| 59. | Ramon Cordova | 114 | 240.3 | 2023 | |
| Todd Neary | 114 | 216.7 | 2021 | ||
| Hugh Hoots | 114 | 244.0 | 2014 | ||
| Joseph Smartt | 114 | 240.3 | 2008 | ||
| Ferdinand Lueras | 114 | 238.0 | 2008 | ||
| 64. | Cliff Summey | 113 | 182.3 | 2028 | |
| Harold Lava | 113 | 178.7 | 2023 | ||
| Ramon Cordova | 113 | 264.0 | 2021 | ||
| Billy Powell | 113 | 266.0 | 2018 | ||
| Galon Thrace | 113 | 258.3 | 2015 | ||
| Jamie Agee | 113 | 245.7 | 2009 | ||
| Max Calderon | 113 | 207.0 | 2008 | ||
| Skip Burns | 113 | 223.3 | 2006 | ||
| Nathan Cramer | 113 | 192.3 | 2004 | ||
| 73. | Stanford Heinz | 112 | 229.7 | 2029 | |
| Todd Neary | 112 | 228.3 | 2025 | ||
| Ronaldo Laguna | 112 | 243.3 | 2024 | ||
| Ramon Cordova | 112 | 236.3 | 2022 | ||
| John Spyer | 112 | 162.3 | 2022 | ||
| Leon Hernandez | 112 | 210.7 | 2014 | ||
| Tobias Escobar | 112 | 281.3 | 2009 | ||
| Jesus Aviles | 112 | 264.0 | 2005 | ||
| Eric Song | 112 | 241.0 | 2002 | ||
| 82. | Benny Suarez | 111 | 258.7 | 2023 | |
| Owen Brunton | 111 | 177.7 | 2012 | ||
| Bobb Beasley | 111 | 208.0 | 2010 | ||
| Phillip Reyes | 111 | 220.7 | 2006 | ||
| Hugh Hoots | 111 | 274.0 | 2003 | ||
| 87. | Galon Thrace | 110 | 223.0 | 2023 | |
| Bernard Meza | 110 | 192.0 | 2016 | ||
| 89. | Ronaldo Laguna | 109 | 222.3 | 2029 | |
| Walter Piccirillo | 109 | 224.3 | 2021 | ||
| Todd Neary | 109 | 197.3 | 2020 | ||
| Christopher Paladino | 109 | 228.7 | 2016 | ||
| Alfred Marenco | 109 | 231.7 | 2014 | ||
| Hugh Hoots | 109 | 298.3 | 2007 | ||
| Gene Foxworth | 109 | 239.3 | 2007 | ||
| David Evans | 109 | 250.7 | 2002 | ||
| 97. | Alfonso Manrique | 108 | 208.3 | 2026 | |
| Ronaldo Laguna | 108 | 223.7 | 2023 | ||
| Jesse Rankins | 108 | 168.0 | 2019 | ||
| Bruce Sikes | 108 | 200.7 | 2018 |
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