| Home | Players | Teams | Leagues | Managers | Leaderboards | Win Shares | Awards | Help | |
| Single-Season ERA Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | ERA | IP | Year | Career Leaderboard |
| 1. | Justin Paige | 2.478 | 210.7 | 1952 | |
| 2. | Nathaniel McInerney | 2.949 | 253.3 | 1955 | |
| 3. | Harry Robin | 3.079 | 304.0 | 1955 | |
| 4. | Clyde Pearson | 3.109 | 304.0 | 1955 | |
| 5. | Bruce Carlson | 3.188 | 288.0 | 1953 | |
| 6. | Francis Wachter | 3.267 | 281.0 | 1953 | |
| 7. | Eddie Dillon | 3.312 | 195.7 | 1955 | |
| 8. | Robert Stadler | 3.340 | 318.0 | 1952 | |
| 9. | Harry Frink | 3.370 | 208.3 | 1952 | |
| 10. | John Alton | 3.379 | 303.7 | 1954 | |
| 11. | Jason Williams | 3.396 | 270.3 | 1954 | |
| 12. | Michael Knepper | 3.412 | 308.7 | 1953 | |
| 13. | Michael Knepper | 3.426 | 328.3 | 1954 | |
| 14. | Ruben Ibarra | 3.430 | 244.0 | 1954 | |
| 15. | Robert Stadler | 3.466 | 210.3 | 1955 | |
| 16. | Clyde Pearson | 3.469 | 251.7 | 1954 | |
| 17. | Isaias Jimenez | 3.472 | 220.3 | 1955 | |
| 18. | Michael Sturges | 3.491 | 301.7 | 1952 | |
| 19. | Cameron Hagans | 3.502 | 311.0 | 1953 | |
| 20. | Donald Phillips | 3.504 | 313.3 | 1955 | |
| 21. | Dante Ruiz | 3.505 | 303.0 | 1953 | |
| 22. | Justin Paige | 3.538 | 269.7 | 1953 | |
| 23. | Jason Williams | 3.554 | 283.7 | 1955 | |
| 24. | Clyde Pearson | 3.612 | 251.7 | 1953 | |
| 25. | Michael Jackson | 3.615 | 234.0 | 1954 | |
| 26. | Michael Sturges | 3.646 | 323.3 | 1954 | |
| 27. | John Alton | 3.656 | 160.0 | 1955 | |
| 28. | Clemente Vilas | 3.661 | 287.7 | 1955 | |
| 29. | George Gumm | 3.667 | 297.0 | 1955 | |
| 30. | Donald Phillips | 3.667 | 223.3 | 1953 | |
| 31. | Jason Williams | 3.672 | 242.7 | 1953 | |
| 32. | Keith Amezcua | 3.709 | 242.7 | 1955 | |
| 33. | Dante Ruiz | 3.717 | 293.0 | 1954 | |
| 34. | Harry Robin | 3.756 | 266.0 | 1953 | |
| 35. | Donald Phillips | 3.757 | 294.7 | 1954 | |
| 36. | Carl Nicosia | 3.762 | 284.7 | 1955 | |
| 37. | Winfred Converse | 3.776 | 255.0 | 1953 | |
| 38. | Raymond Curry | 3.782 | 240.3 | 1953 | |
| 39. | Justin Paige | 3.785 | 249.7 | 1954 | |
| 40. | Francis Wachter | 3.794 | 284.7 | 1955 | |
| 41. | Dante Ruiz | 3.819 | 306.3 | 1952 | |
| 42. | Osvaldo Valtierra | 3.821 | 315.7 | 1952 | |
| 43. | Christian Schwandt | 3.831 | 192.7 | 1955 | |
| 44. | Austin Deel | 3.849 | 299.3 | 1954 | |
| 45. | Eddie Dillon | 3.851 | 196.3 | 1954 | |
| 46. | Walter Meas | 3.863 | 233.0 | 1952 | |
| 47. | Jack Hitchcock | 3.866 | 277.0 | 1953 | |
| 48. | George Ogren | 3.868 | 239.7 | 1955 | |
| 49. | Joshua Stephens | 3.891 | 305.3 | 1952 | |
| 50. | Austin Deel | 3.910 | 145.0 | 1955 | |
| 51. | Billy Delucia | 3.914 | 292.0 | 1953 | |
| 52. | Austin Deel | 3.919 | 165.3 | 1953 | |
| 53. | Clyde Pearson | 3.920 | 245.7 | 1952 | |
| 54. | Bruce Carlson | 3.939 | 297.0 | 1954 | |
| 55. | Donald Phillips | 3.941 | 308.3 | 1952 | |
| 56. | Luis Almaraz | 3.945 | 146.0 | 1953 | |
| 57. | Harry Frink | 3.960 | 250.0 | 1955 | |
| 58. | William Sera | 3.964 | 156.7 | 1955 | |
| 59. | George Gumm | 3.967 | 199.7 | 1953 | |
| 60. | Michael Sturges | 3.968 | 290.3 | 1953 | |
| 61. | Theo Pettry | 3.978 | 276.0 | 1952 | |
| 62. | Glenn Mungo | 3.979 | 158.3 | 1955 | |
| 63. | Cameron Hagans | 3.980 | 294.0 | 1954 | |
| 64. | Francis Wachter | 3.982 | 237.3 | 1952 | |
| 65. | Bruce Carlson | 3.984 | 253.0 | 1955 | |
| 66. | Gary Wadsworth | 3.992 | 200.7 | 1955 | |
| 67. | David Caviness | 3.992 | 218.7 | 1955 | |
| 68. | Harry Frink | 3.998 | 274.7 | 1953 | |
| 69. | Guillermo Rios | 4.006 | 224.7 | 1954 | |
| 70. | George Ogren | 4.010 | 226.7 | 1954 | |
| 71. | Michael Naron | 4.027 | 257.0 | 1952 | |
| 72. | Alexis Aguiar | 4.028 | 181.0 | 1955 | |
| 73. | Jason Williams | 4.029 | 210.0 | 1952 | |
| 74. | Michael Jackson | 4.043 | 269.3 | 1955 | |
| 75. | Fabian Cordova | 4.048 | 289.0 | 1954 | |
| 76. | Matt Freeborn | 4.050 | 240.0 | 1953 | |
| 77. | Walter Meas | 4.050 | 213.3 | 1955 | |
| 78. | Russell Kiel | 4.054 | 222.0 | 1955 | |
| 79. | Tracy Dodson | 4.060 | 221.7 | 1954 | |
| 80. | Jack Hitchcock | 4.065 | 265.7 | 1952 | |
| 81. | Eduardo Garza | 4.067 | 294.3 | 1955 | |
| Robert Stadler | 4.067 | 294.3 | 1953 | ||
| 83. | Gary Wadsworth | 4.085 | 220.3 | 1953 | |
| 84. | Dante Ruiz | 4.085 | 293.0 | 1955 | |
| 85. | Harry Robin | 4.089 | 310.3 | 1954 | |
| 86. | Marcus Hoops | 4.109 | 168.7 | 1952 | |
| 87. | David Caviness | 4.128 | 213.7 | 1954 | |
| 88. | Bryan Mitchell | 4.131 | 150.3 | 1952 | |
| 89. | Charles Royston | 4.138 | 174.0 | 1954 | |
| 90. | Andrew Muller | 4.173 | 284.7 | 1952 | |
| 91. | Harry Frink | 4.179 | 271.3 | 1954 | |
| 92. | Antonio Padula | 4.180 | 243.3 | 1953 | |
| 93. | Isaias Jimenez | 4.187 | 253.7 | 1953 | |
| 94. | Ruben Ibarra | 4.187 | 230.0 | 1953 | |
| 95. | John Kelley | 4.195 | 186.7 | 1952 | |
| 96. | Winfred Converse | 4.204 | 233.3 | 1952 | |
| 97. | Fabian Cordova | 4.210 | 248.0 | 1955 | |
| 98. | Rodney Bond | 4.213 | 256.3 | 1952 | |
| 99. | Kasey Cook | 4.237 | 284.7 | 1952 | |
| 100. | Juan Daggett | 4.265 | 255.3 | 1952 |
| For questions or to report errors, please send us a note. |