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| Single-Season Walks Allowed Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Walks Allowed | IP | Year | Career Leaderboard |
| 1. | Ronnie Nesmith | 90 | 211.0 | 2009 | |
| 2. | Walter Frost | 89 | 170.0 | 2007 | |
| 3. | Silvio Perez | 88 | 233.7 | 2007 | |
| 4. | Victor McFaddin | 87 | 218.3 | 2009 | |
| 5. | Dillon Crawford | 86 | 222.3 | 2007 | |
| Victor McFaddin | 86 | 211.0 | 2007 | ||
| 7. | John Flora | 85 | 211.3 | 2009 | |
| 8. | Robert Welsch | 84 | 238.0 | 2007 | |
| 9. | David Jarvis | 82 | 213.3 | 2009 | |
| Juan Martinez | 82 | 224.0 | 2007 | ||
| 11. | John Suggs | 79 | 213.7 | 2007 | |
| 12. | Adan Gingras | 78 | 193.3 | 2009 | |
| 13. | Dillon Crawford | 77 | 226.0 | 2009 | |
| Ronnie Nesmith | 77 | 205.0 | 2008 | ||
| 15. | John Moronta | 76 | 257.7 | 2008 | |
| Oswaldo Acuņa | 76 | 219.0 | 2007 | ||
| 17. | Jermaine Spates | 75 | 211.7 | 2009 | |
| 18. | David Jarvis | 74 | 223.3 | 2008 | |
| Byron Hernandez | 74 | 220.0 | 2008 | ||
| David Jarvis | 74 | 256.0 | 2007 | ||
| Brandon Jarrett | 74 | 182.0 | 2007 | ||
| 22. | Robert Amundson | 73 | 202.7 | 2009 | |
| 23. | Walter Frost | 72 | 158.7 | 2008 | |
| 24. | John Porter | 71 | 272.3 | 2009 | |
| Paul Therrien | 71 | 243.3 | 2009 | ||
| Gregory Micco | 71 | 187.3 | 2009 | ||
| John Flora | 71 | 201.7 | 2007 | ||
| 28. | Albert Martineau | 69 | 233.0 | 2009 | |
| Jack Smith | 69 | 237.0 | 2008 | ||
| Brandon Jarrett | 69 | 201.3 | 2008 | ||
| Ruben Olmeda | 69 | 178.0 | 2007 | ||
| 32. | Kenneth Robinson | 68 | 216.0 | 2008 | |
| John Flora | 68 | 209.3 | 2008 | ||
| 34. | Fidel Havana | 67 | 186.0 | 2009 | |
| 35. | Silvio Perez | 66 | 187.0 | 2009 | |
| Telmo Cosenza | 66 | 233.0 | 2008 | ||
| Ernesto Mejias | 66 | 248.0 | 2007 | ||
| John Moronta | 66 | 239.3 | 2007 | ||
| Joshua Grothe | 66 | 224.7 | 2007 | ||
| James Barton | 66 | 216.3 | 2007 | ||
| 41. | Alvin Medina | 63 | 194.7 | 2009 | |
| Juan Martinez | 63 | 156.0 | 2009 | ||
| Ruben Olmeda | 63 | 165.7 | 2008 | ||
| Joseph Carraway | 63 | 152.3 | 2008 | ||
| 45. | Albert Martineau | 62 | 190.3 | 2008 | |
| John Suggs | 62 | 157.3 | 2008 | ||
| Gregory Micco | 62 | 217.0 | 2007 | ||
| 48. | John Moronta | 61 | 270.0 | 2009 | |
| Fredrick Planas | 61 | 198.7 | 2009 | ||
| Higinio Hernandez | 61 | 166.3 | 2009 | ||
| Fidel Havana | 61 | 211.7 | 2008 | ||
| Oscar Moreno | 61 | 211.3 | 2008 | ||
| David Borges | 61 | 193.3 | 2008 | ||
| Felix Pedraza | 61 | 183.3 | 2008 | ||
| Paul Therrien | 61 | 219.0 | 2007 | ||
| 56. | Robert Welsch | 60 | 214.0 | 2009 | |
| Kenneth Robinson | 60 | 150.0 | 2009 | ||
| 58. | Paul Therrien | 59 | 222.7 | 2008 | |
| Marvin Hawkins | 59 | 192.7 | 2007 | ||
| Timothy Houston | 59 | 184.3 | 2007 | ||
| Adan Gingras | 59 | 169.7 | 2007 | ||
| Angel Barbosa | 59 | 168.0 | 2007 | ||
| Edson Paredes | 59 | 152.3 | 2007 | ||
| 64. | Carlos Leal | 58 | 220.3 | 2009 | |
| Angel Barbosa | 58 | 192.3 | 2008 | ||
| Edson Paredes | 58 | 166.0 | 2008 | ||
| Gregory Micco | 58 | 153.3 | 2008 | ||
| Ronnie Nesmith | 58 | 157.7 | 2007 | ||
| 69. | Jim Lenahan | 57 | 208.0 | 2009 | |
| Bill Inman | 57 | 207.3 | 2009 | ||
| Manny Quijada | 57 | 216.0 | 2008 | ||
| Jermaine Spates | 57 | 199.3 | 2008 | ||
| Adrian Pastrana | 57 | 169.3 | 2007 | ||
| 74. | Hideki Suzuki | 56 | 225.0 | 2009 | |
| Ernesto Mejias | 56 | 185.3 | 2009 | ||
| James Rosa | 56 | 108.7 | 2009 | ||
| Vernon Olguin | 56 | 230.3 | 2008 | ||
| James Barton | 56 | 216.3 | 2008 | ||
| Alfred Taylor | 56 | 154.0 | 2008 | ||
| Erik Wells | 56 | 147.7 | 2008 | ||
| Oscar Moreno | 56 | 169.7 | 2007 | ||
| 82. | John Porter | 55 | 212.3 | 2008 | |
| Telmo Cosenza | 55 | 247.0 | 2007 | ||
| 84. | Telmo Cosenza | 54 | 200.7 | 2009 | |
| Wilfredo Erazo | 54 | 169.3 | 2009 | ||
| Man Mattia | 54 | 215.3 | 2008 | ||
| Alvin Medina | 54 | 213.0 | 2008 | ||
| Robert Welsch | 54 | 209.7 | 2008 | ||
| 89. | Bill Inman | 53 | 224.7 | 2008 | |
| Mitch Diehl | 53 | 138.3 | 2007 | ||
| 91. | Winfred Lee | 52 | 192.3 | 2009 | |
| Brandon Jarrett | 52 | 178.3 | 2009 | ||
| Ezequiel Pastrana | 52 | 86.7 | 2009 | ||
| Dillon Crawford | 52 | 202.0 | 2008 | ||
| Silvio Perez | 52 | 156.3 | 2008 | ||
| Austin Vosburgh | 52 | 192.3 | 2007 | ||
| Alvin Medina | 52 | 175.0 | 2007 | ||
| 98. | William Tuggle | 51 | 230.7 | 2009 | |
| Victor McFaddin | 51 | 155.0 | 2008 | ||
| Stephen Pope | 51 | 176.0 | 2007 |
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