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| Career ERA Leaderboard | |
| * - Indicates Hall of Fame Bold - Indicates active player |
| Rank | Player | ERA | IP | Years | Single Season Leaderboard |
| 1. | Steve Nebraska * | 2.040 | 4774.3 | 1973-1991 | |
| 2. | Heath Rockefeller | 2.402 | 1776.3 | 1985-1994 | |
| 3. | Mark Bobovnik * | 2.697 | 2916.9 | 1979-1992 | |
| 4. | Johan Schmatzhagen * | 2.703 | 2760.7 | 1973-1984 | |
| 5. | Evander Kilkenny | 2.732 | 2523.0 | 1983-1994 | |
| 6. | Ken Howell | 2.758 | 1817.6 | 1984-1994 | |
| 7. | Vernon Simpson * | 2.810 | 1575.7 | 1973-1978 | |
| 8. | Jerry Syed * | 2.916 | 3129.3 | 1976-1990 | |
| 9. | Roy Hobbs, Jr. * | 2.924 | 2738.9 | 1973-1982 | |
| 10. | Corey Aubrey | 2.937 | 2613.9 | 1974-1988 | |
| 11. | Kurt Stallwith * | 2.969 | 2594.6 | 1973-1984 | |
| 12. | Allan Atkins | 3.031 | 1413.3 | 1984-1994 | |
| 13. | Timothy Regina | 3.040 | 2196.9 | 1982-1994 | |
| 14. | John Ross Riles, Jr. | 3.042 | 3041.3 | 1981-1994 | |
| 15. | Marcellus Conley | 3.043 | 2180.0 | 1973-1981 | |
| 16. | Sam Kirkpatrick | 3.110 | 2760.6 | 1982-1994 | |
| 17. | Ivan Aguilera | 3.140 | 1659.3 | 1977-1988 | |
| 18. | Floyd Bannister | 3.144 | 2530.3 | 1983-1994 | |
| 19. | Gil Daniels | 3.157 | 1508.0 | 1983-1994 | |
| 20. | Kirk Dirt | 3.187 | 1612.3 | 1973-1981 | |
| 21. | Bryan Canniff | 3.190 | 1281.0 | 1973-1983 | |
| 22. | Bill Max * | 3.231 | 3376.3 | 1975-1989 | |
| 23. | James Raya | 3.253 | 1494.0 | 1975-1986 | |
| 24. | Julio Guillerma | 3.255 | 2613.0 | 1973-1983 | |
| 25. | Felix Pan | 3.271 | 1458.3 | 1988-1994 | |
| 26. | Andy Messersmith | 3.311 | 2028.0 | 1976-1984 | |
| 27. | Hi Brown | 3.311 | 1854.0 | 1985-1994 | |
| 28. | Justin Alexander * | 3.313 | 3124.3 | 1976-1992 | |
| 29. | George Thrilkil | 3.334 | 1228.3 | 1976-1993 | |
| 30. | Mark Everett | 3.340 | 1215.3 | 1978-1994 | |
| 31. | Voo Fowler | 3.348 | 2376.3 | 1973-1983 | |
| 32. | Brock Rutherford | 3.349 | 1685.0 | 1973-1979 | |
| 33. | Keith Chea | 3.387 | 1156.0 | 1975-1979 | |
| 34. | Nick Sixx | 3.396 | 1147.7 | 1973-1978 | |
| 35. | Billy Chapel | 3.397 | 1708.6 | 1973-1980 | |
| 36. | Narciso Jarilla | 3.403 | 1864.3 | 1973-1982 | |
| 37. | Frank Rogers | 3.408 | 2506.3 | 1974-1988 | |
| 38. | Ebby Calvin Laloosh | 3.411 | 1308.6 | 1973-1980 | |
| 39. | Claver Olmeda | 3.414 | 2892.3 | 1982-1993 | |
| 40. | Michael Mangual * | 3.426 | 3711.6 | 1975-1991 | |
| 41. | Hank Daniels | 3.450 | 2509.3 | 1984-1994 | |
| 42. | Mark Fidrych | 3.451 | 2746.3 | 1978-1991 | |
| 43. | Scott Finister | 3.454 | 1034.3 | 1973-1978 | |
| 44. | Bobby Carey | 3.461 | 1927.0 | 1975-1985 | |
| 45. | Arky Mooris | 3.464 | 1829.0 | 1973-1981 | |
| 46. | Juan Verde | 3.473 | 1821.6 | 1977-1990 | |
| 47. | Lorenzo Diaz | 3.480 | 3266.6 | 1974-1989 | |
| 48. | Jeff Rosenrosen | 3.481 | 1520.3 | 1973-1979 | |
| 49. | Luke Nastay | 3.483 | 1486.0 | 1984-1994 | |
| 50. | Burke Eschette | 3.486 | 1365.6 | 1973-1978 | |
| 51. | Matt Ryan | 3.487 | 2679.3 | 1981-1993 | |
| 52. | Kevin Saucier | 3.498 | 1823.9 | 1983-1994 | |
| 53. | Ace Holder | 3.500 | 2293.6 | 1973-1982 | |
| 54. | Braggo Franco | 3.501 | 3375.6 | 1978-1994 | |
| 55. | James Watkins | 3.510 | 2420.3 | 1976-1988 | |
| 56. | Shamus Perfetto | 3.511 | 2081.6 | 1984-1994 | |
| 57. | Damian Bedgood | 3.513 | 1237.3 | 1989-1994 | |
| 58. | Fernando Huertas | 3.518 | 3950.3 | 1976-1993 | |
| 59. | Greg Doonin | 3.536 | 1199.0 | 1973-1977 | |
| 60. | Damon Rutherford | 3.540 | 1052.6 | 1973-1982 | |
| 61. | Louis Sheffield | 3.558 | 1112.9 | 1977-1991 | |
| 62. | Lank Bechard | 3.565 | 1002.3 | 1973-1978 | |
| 63. | Todd Terry | 3.579 | 1808.0 | 1973-1981 | |
| 64. | Alex Lopez | 3.584 | 2767.0 | 1978-1991 | |
| 65. | Jamaal Jumboni | 3.602 | 1939.0 | 1973-1982 | |
| 66. | Pete Redfern | 3.604 | 2120.3 | 1983-1994 | |
| 67. | Hayden Finch | 3.613 | 2281.6 | 1983-1994 | |
| 68. | Joaquin Contraveras | 3.615 | 1489.0 | 1973-1979 | |
| 69. | J.R. Richard | 3.617 | 1764.0 | 1981-1989 | |
| 70. | Jose Higa | 3.627 | 1079.3 | 1975-1989 | |
| 71. | Pablo Verlohi | 3.631 | 1487.3 | 1973-1979 | |
| 72. | Louis Mattison | 3.635 | 1082.0 | 1975-1989 | |
| 73. | Ron Vivero | 3.637 | 2697.0 | 1973-1983 | |
| 74. | Brent Beemings | 3.638 | 1417.6 | 1973-1983 | |
| 75. | Ricardo Barrera | 3.639 | 1355.3 | 1982-1994 | |
| 76. | Isidro Guiterrez | 3.647 | 2714.6 | 1982-1994 | |
| 77. | Michael Hick | 3.661 | 1234.0 | 1974-1979 | |
| 78. | Scott Blundon | 3.667 | 1222.3 | 1973-1978 | |
| 79. | Tex Avery | 3.674 | 2488.6 | 1981-1993 | |
| 80. | Al Nipper | 3.683 | 1918.3 | 1984-1994 | |
| 81. | Paul Khalil | 3.692 | 2825.6 | 1977-1992 | |
| 82. | Harland Riles | 3.692 | 1045.7 | 1973-1977 | |
| 83. | Rudy Sparrow | 3.695 | 1193.6 | 1977-1993 | |
| 84. | Bill Walters | 3.701 | 2567.6 | 1983-1994 | |
| 85. | Rudy Ramirez | 3.703 | 1580.0 | 1973-1980 | |
| 86. | Cornelius Lattimore | 3.709 | 1075.0 | 1973-1978 | |
| 87. | Filla Zerndillo | 3.714 | 1124.3 | 1973-1979 | |
| 88. | Santos Vazquez | 3.722 | 1272.0 | 1988-1994 | |
| 89. | Allan Bartlett | 3.739 | 1834.3 | 1985-1994 | |
| 90. | Roy Anderson | 3.744 | 1629.6 | 1976-1987 | |
| 91. | Mickey Ford | 3.749 | 2288.0 | 1976-1986 | |
| 92. | Steven Cuvelier | 3.754 | 1206.0 | 1981-1994 | |
| 93. | Zachary Sumner | 3.755 | 2398.9 | 1973-1983 | |
| 94. | Chuck Delong | 3.767 | 2391.6 | 1973-1984 | |
| 95. | Eddie Harris | 3.769 | 1215.3 | 1989-1994 | |
| 96. | Chip Foodie | 3.772 | 1116.7 | 1989-1994 | |
| 97. | Aaron Alfonso | 3.776 | 1368.0 | 1973-1979 | |
| 98. | Adam Abramowitz | 3.796 | 1794.7 | 1976-1986 | |
| 99. | Anthony Ball | 3.803 | 1815.3 | 1973-1981 | |
| 100. | Jacob Butler | 3.807 | 1811.0 | 1975-1983 |
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