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| Single Post-Season ERA Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | ERA | IP | Year | Team | Career Leaderboard |
| 1. | Sauron Evil | 1.957 | 23.0 | 2000 | PEN | |
| 2. | Jeeves Van Hooten | 2.077 | 26.0 | 2000 | WAS | |
| 3. | Jose Valdovinos | 2.250 | 28.0 | 2000 | PEN | |
| 4. | Darius Glover | 2.400 | 15.0 | 2000 | LOU | |
| 5. | Steven Stockwell | 2.614 | 10.3 | 2000 | PEN | |
| 6. | Richard Eaker | 2.806 | 25.7 | 2000 | MON | |
| 7. | Ron Yarbrough | 2.844 | 12.7 | 2000 | WAS | |
| 8. | Tyrell Silvera | 2.874 | 15.7 | 2000 | LOU | |
| 9. | Aaron Bacon | 3.070 | 14.7 | 2000 | CAL | |
| 10. | Gerald Johnson | 3.130 | 23.0 | 2000 | PEN | |
| 11. | Vincent Marguez | 3.294 | 13.7 | 2000 | PEN | |
| 12. | Alfred Raskin | 3.462 | 13.0 | 2000 | WIS | |
| 13. | Jose Rivero | 3.600 | 10.0 | 2000 | MON | |
| 14. | Keenan Brochu | 4.184 | 23.7 | 2000 | MON | |
| 15. | Malik Meng | 5.560 | 22.7 | 2000 | WAS | |
| 16. | Armand Banuelos | 5.850 | 20.0 | 2000 | MON | |
| 17. | George Harmon | 6.139 | 14.7 | 2000 | LOU | |
| 18. | Brian Valero | 6.467 | 23.7 | 2000 | MON | |
| 19. | Rene Mills | 6.500 | 18.0 | 2000 | LOU |
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