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| Single-Season Losses Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Losses | IP | Year | Career Leaderboard |
| 1. | Brain Emmer | 25 | 255.7 | 1954 | |
| James Leggett | 25 | 248.3 | 1952 | ||
| 3. | Earl Griffin | 22 | 275.7 | 1954 | |
| 4. | Avelino Canabal | 21 | 314.0 | 1955 | |
| 5. | Larry Bagby | 20 | 264.7 | 1955 | |
| Steven Caesar | 20 | 256.0 | 1955 | ||
| Winfred Converse | 20 | 235.7 | 1955 | ||
| Joshua Stephens | 20 | 296.7 | 1954 | ||
| Eduardo Garza | 20 | 295.3 | 1954 | ||
| Juan Daggett | 20 | 268.3 | 1954 | ||
| Melvin Antonio | 20 | 223.3 | 1954 | ||
| John Toomer | 20 | 271.3 | 1952 | ||
| Steven Caesar | 20 | 246.0 | 1952 | ||
| 14. | Matt Freeborn | 19 | 231.3 | 1954 | |
| James Leggett | 19 | 238.3 | 1953 | ||
| Fabian Cordova | 19 | 307.0 | 1952 | ||
| Thomas Brownlow | 19 | 265.7 | 1952 | ||
| 18. | Isaias Jimenez | 18 | 276.7 | 1954 | |
| Antonio Padula | 18 | 262.0 | 1954 | ||
| Nathaniel McInerney | 18 | 234.0 | 1954 | ||
| George Bash | 18 | 258.3 | 1953 | ||
| Chester Belue | 18 | 257.3 | 1953 | ||
| Osvaldo Valtierra | 18 | 315.7 | 1952 | ||
| Frank Haws | 18 | 245.3 | 1952 | ||
| 25. | Salomon Mejorado | 17 | 260.7 | 1955 | |
| Jermaine Jensen | 17 | 248.7 | 1955 | ||
| Charles Royston | 17 | 235.3 | 1955 | ||
| Christopher Leatherwood | 17 | 230.0 | 1955 | ||
| Cameron Hagans | 17 | 224.7 | 1955 | ||
| Francis Wachter | 17 | 284.7 | 1954 | ||
| James Kimbrough | 17 | 273.7 | 1954 | ||
| John Loomis | 17 | 187.7 | 1954 | ||
| Joshua Stephens | 17 | 320.0 | 1953 | ||
| Osvaldo Valtierra | 17 | 297.7 | 1953 | ||
| Eduardo Garza | 17 | 276.0 | 1953 | ||
| Danny Simmons | 17 | 273.0 | 1953 | ||
| Juan Daggett | 17 | 217.7 | 1953 | ||
| Todd Barlowe | 17 | 157.7 | 1953 | ||
| Donald Phillips | 17 | 308.3 | 1952 | ||
| Alejo Torralbo | 17 | 287.0 | 1952 | ||
| Richard Sanders | 17 | 260.3 | 1952 | ||
| Michael Jackson | 17 | 223.7 | 1952 | ||
| Gary Wadsworth | 17 | 218.0 | 1952 | ||
| Ruben Ibarra | 17 | 215.7 | 1952 | ||
| 45. | Jack Hitchcock | 16 | 267.0 | 1955 | |
| Guillermo Rios | 16 | 230.7 | 1955 | ||
| Michael Donnelly | 16 | 207.0 | 1955 | ||
| James Hudgens | 16 | 195.0 | 1955 | ||
| Harry Robin | 16 | 310.3 | 1954 | ||
| Austin Deel | 16 | 299.3 | 1954 | ||
| Kevin Clingerman | 16 | 257.3 | 1954 | ||
| Walter Meas | 16 | 290.7 | 1953 | ||
| Bill Pelfrey | 16 | 271.7 | 1953 | ||
| Alexis Aguiar | 16 | 271.7 | 1953 | ||
| Andrew Muller | 16 | 243.3 | 1953 | ||
| Richard Sanders | 16 | 238.0 | 1953 | ||
| Billy Delucia | 16 | 292.3 | 1952 | ||
| Kasey Cook | 16 | 284.7 | 1952 | ||
| Thomas Crystal | 16 | 276.3 | 1952 | ||
| Roland Greenman | 16 | 268.0 | 1952 | ||
| Everett Colletti | 16 | 254.0 | 1952 | ||
| Nathaniel Richardson | 16 | 242.3 | 1952 | ||
| 63. | Michael Knepper | 15 | 292.7 | 1955 | |
| Clemente Vilas | 15 | 287.7 | 1955 | ||
| Alexander Lenihan | 15 | 257.3 | 1955 | ||
| Matt Freeborn | 15 | 186.0 | 1955 | ||
| Jon Schmidt | 15 | 175.7 | 1955 | ||
| Gary Wadsworth | 15 | 295.7 | 1954 | ||
| James Johnson | 15 | 230.0 | 1954 | ||
| George Gumm | 15 | 191.3 | 1954 | ||
| John Alton | 15 | 302.7 | 1953 | ||
| Richard Bush | 15 | 292.3 | 1953 | ||
| Justin Paige | 15 | 269.7 | 1953 | ||
| David Stilwell | 15 | 267.0 | 1953 | ||
| Stephen Gilbert | 15 | 225.0 | 1953 | ||
| Roy Waites | 15 | 211.7 | 1953 | ||
| Frank Haws | 15 | 120.3 | 1953 | ||
| Joshua Stephens | 15 | 305.3 | 1952 | ||
| Gerald Adkisson | 15 | 296.3 | 1952 | ||
| Frank Delmonte | 15 | 283.7 | 1952 | ||
| John Alton | 15 | 273.7 | 1952 | ||
| Wilber Gullett | 15 | 241.0 | 1952 | ||
| Bill Laureano | 15 | 229.7 | 1952 | ||
| 84. | Harry Frink | 14 | 250.0 | 1955 | |
| Earle Roberts | 14 | 247.0 | 1955 | ||
| Bill Pelfrey | 14 | 188.3 | 1955 | ||
| Bryan Crossett | 14 | 183.0 | 1955 | ||
| Bruce Carlson | 14 | 297.0 | 1954 | ||
| Cameron Hagans | 14 | 294.0 | 1954 | ||
| Michael Donnelly | 14 | 265.7 | 1954 | ||
| Robert Stadler | 14 | 294.3 | 1953 | ||
| Michael Sturges | 14 | 290.3 | 1953 | ||
| Alexander Lenihan | 14 | 263.3 | 1953 | ||
| Carl Nicosia | 14 | 253.3 | 1953 | ||
| Fabian Cordova | 14 | 250.7 | 1953 | ||
| Theo Pettry | 14 | 247.7 | 1953 | ||
| Christopher Leatherwood | 14 | 243.0 | 1953 | ||
| Raymond Curry | 14 | 240.3 | 1953 | ||
| Robert Stadler | 14 | 318.0 | 1952 | ||
| Michael Knepper | 14 | 316.7 | 1952 |
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