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| Single-Season Walks Allowed Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Walks Allowed | IP | Year | Career Leaderboard |
| 1. | Jackie Varela | 158 | 273.0 | 1978 | |
| 2. | Jackie Varela | 148 | 270.3 | 1977 | |
| 3. | Alfredo Martinez | 145 | 202.3 | 1985 | |
| 4. | John Fillion | 141 | 198.3 | 1986 | |
| 5. | Tommy Euller | 140 | 250.3 | 1978 | |
| 6. | Tommy Euller | 138 | 240.0 | 1979 | |
| 7. | Alfredo Martinez | 137 | 191.3 | 1987 | |
| Jose Abbey | 137 | 233.7 | 1977 | ||
| J.R. Riles | 137 | 207.3 | 1974 | ||
| 10. | Tito Corbin | 133 | 300.3 | 1975 | |
| 11. | Christopher Pump | 132 | 231.0 | 1978 | |
| 12. | Alfredo Martinez | 128 | 175.0 | 1986 | |
| Cornelius Clayson | 128 | 214.3 | 1975 | ||
| Pete Bucher | 128 | 251.0 | 1973 | ||
| 15. | Stephen Thiel | 127 | 177.3 | 1986 | |
| 16. | Stephen Thiel | 126 | 231.0 | 1985 | |
| Alvin Harrison | 126 | 235.7 | 1976 | ||
| Burke Eschette | 126 | 287.3 | 1975 | ||
| Luke Gofannon | 126 | 259.7 | 1974 | ||
| 20. | Stephen Thiel | 125 | 212.3 | 1987 | |
| J.R. Richard | 125 | 208.0 | 1986 | ||
| Wayne Simpson | 125 | 208.7 | 1978 | ||
| Albert Diaz | 125 | 204.0 | 1978 | ||
| 24. | Olen Eoff | 124 | 245.0 | 1987 | |
| Olen Eoff | 124 | 221.3 | 1986 | ||
| Jackie Varela | 124 | 271.0 | 1979 | ||
| 27. | Olen Eoff | 123 | 210.7 | 1983 | |
| Jackie Varela | 123 | 231.3 | 1980 | ||
| Brock Rutherford | 123 | 257.0 | 1978 | ||
| Haystack Duggeler | 123 | 227.0 | 1977 | ||
| 31. | Blaine Kinman | 122 | 185.7 | 1986 | |
| Pete Bucher | 122 | 262.0 | 1976 | ||
| 33. | Hector Juarez | 121 | 262.7 | 1975 | |
| Tito Corbin | 121 | 244.3 | 1973 | ||
| 35. | Alfredo Martinez | 120 | 172.0 | 1988 | |
| Lawrence Lewalk | 120 | 232.0 | 1975 | ||
| Adrian Gelinas | 120 | 232.0 | 1974 | ||
| 38. | Olen Eoff | 119 | 235.3 | 1984 | |
| Jim McGraw | 119 | 169.7 | 1981 | ||
| Luke Gofannon | 119 | 270.3 | 1976 | ||
| Mack Leblanc | 119 | 224.7 | 1975 | ||
| Jose Abbey | 119 | 244.0 | 1974 | ||
| Adrian Gelinas | 119 | 205.0 | 1973 | ||
| 44. | Frank Tanana | 118 | 208.7 | 1987 | |
| Albert Diaz | 118 | 215.3 | 1976 | ||
| Lawrence Lewalk | 118 | 220.0 | 1973 | ||
| 47. | Robert Chung | 117 | 215.7 | 1978 | |
| Brock Rutherford | 117 | 259.0 | 1977 | ||
| Tommy Euller | 117 | 209.7 | 1977 | ||
| 50. | Tommy Euller | 116 | 223.7 | 1975 | |
| 51. | Robert Rodriguez | 115 | 191.7 | 1987 | |
| Fernando Huertas | 115 | 223.7 | 1986 | ||
| John Fillion | 115 | 200.3 | 1985 | ||
| Haystack Duggeler | 115 | 220.0 | 1975 | ||
| 55. | Paul Millbauer | 114 | 212.7 | 1979 | |
| Albert Diaz | 114 | 229.0 | 1977 | ||
| Brock Rutherford | 114 | 284.3 | 1976 | ||
| Matt Flanigan | 114 | 224.0 | 1976 | ||
| Sol Hernandez | 114 | 186.0 | 1976 | ||
| 60. | John Flaskamper | 113 | 170.3 | 1992 | |
| Blaine Kinman | 113 | 183.7 | 1988 | ||
| Manuel Calavera | 113 | 196.0 | 1986 | ||
| Steve King | 113 | 165.3 | 1986 | ||
| Robert Rodriguez | 113 | 177.0 | 1984 | ||
| Andy Messersmith | 113 | 303.0 | 1976 | ||
| Raz Nugent | 113 | 197.3 | 1975 | ||
| Steve Blass | 113 | 171.3 | 1975 | ||
| Burt Grossman | 113 | 237.3 | 1974 | ||
| Kerwin Parker | 113 | 194.3 | 1974 | ||
| 70. | Mark Birkbeck | 112 | 157.7 | 1987 | |
| Nick Machiavelli | 112 | 138.7 | 1987 | ||
| Jose Abbey | 112 | 231.3 | 1975 | ||
| Jackie Varela | 112 | 225.3 | 1975 | ||
| Tito Corbin | 112 | 245.0 | 1974 | ||
| 75. | John Flaskamper | 111 | 178.7 | 1990 | |
| Ferdy Orta | 111 | 169.0 | 1987 | ||
| Robert Rodriguez | 111 | 211.7 | 1983 | ||
| Alvin Harrison | 111 | 192.3 | 1977 | ||
| 79. | Fernando Huertas | 110 | 302.3 | 1977 | |
| Paul Millbauer | 110 | 212.7 | 1976 | ||
| 81. | Robert Rodriguez | 109 | 201.7 | 1982 | |
| Adam Abramowitz | 109 | 187.0 | 1981 | ||
| Burt Grossman | 109 | 223.3 | 1977 | ||
| Burke Eschette | 109 | 291.0 | 1976 | ||
| 85. | Al Alexander | 108 | 177.7 | 1986 | |
| Jacob Butler | 108 | 201.0 | 1981 | ||
| Ron Vivero | 108 | 275.0 | 1975 | ||
| 88. | Blaine Kinman | 107 | 173.0 | 1987 | |
| Olen Eoff | 107 | 207.3 | 1982 | ||
| Jackie Varela | 107 | 228.7 | 1981 | ||
| 91. | Eric Van Leemer | 106 | 207.7 | 1991 | |
| John Fillion | 106 | 193.3 | 1980 | ||
| Scott Blundon | 106 | 267.0 | 1976 | ||
| 94. | Eric Van Leemer | 105 | 184.0 | 1993 | |
| Avagadro Pompeii | 105 | 215.3 | 1986 | ||
| John Fillion | 105 | 201.7 | 1984 | ||
| Larry Nusbaum | 105 | 117.0 | 1978 | ||
| Don Wilson | 105 | 144.3 | 1977 | ||
| Bill Max * | 105 | 264.3 | 1976 | ||
| Mark Catron | 105 | 236.7 | 1976 |
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