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Career Leaders & Records for Earned Run Average
| Rank | Player (yrs, age) | Earned Run Average | Throws |
|---|---|---|---|
| 1. | Ed Walsh+ (14) | 1.816 | R |
| 2. | Addie Joss+ (9) | 1.887 | R |
| 3. | Jim Devlin (5) | 1.896 | R |
| 4. | Jack Pfiester (8) | 2.024 | L |
| 5. | Smoky Joe Wood (14) | 2.033 | R |
| 6. | Mordecai Brown+ (14) | 2.057 | R |
| 7. | Monte Ward+ (17) | 2.099 | R |
| 8. | Christy Mathewson+ (17) | 2.133 | R |
| Al Spalding+ (8) | 2.133 | R | |
| 10. | Tommy Bond (10) | 2.138 | R |
| 11. | Rube Waddell+ (13) | 2.161 | L |
| 12. | Walter Johnson+ (21) | 2.167 | R |
| 13. | Mariano Rivera (19, 43) | 2.203 | R |
| 14. | Jake Weimer (7) | 2.231 | L |
| 15. | Orval Overall (7) | 2.233 | R |
| 16. | Will White (10) | 2.276 | R |
| 17. | Babe Ruth+ (22) | 2.277 | L |
| 18. | Ed Reulbach (13) | 2.284 | R |
| 19. | Jim Scott (9) | 2.298 | R |
| 20. | Reb Russell (9) | 2.334 | L |
| 21. | Andy Coakley (9) | 2.350 | R |
| Eddie Plank+ (17) | 2.350 | L | |
| 23. | Larry Corcoran (8) | 2.355 | R |
| 24. | Eddie Cicotte (14) | 2.380 | R |
| 25. | George McQuillan (10) | 2.381 | R |
| 26. | Ed Killian (8) | 2.382 | L |
| 27. | Doc White (13) | 2.391 | L |
| 28. | Harry Coveleski (9) | 2.394 | L |
| 29. | Carl Lundgren (8) | 2.417 | R |
| 30. | Nap Rucker (10) | 2.421 | L |
| 31. | Candy Cummings+ (6) | 2.424 | R |
| 32. | Jeff Tesreau (7) | 2.428 | R |
| 33. | Joe Benz (9) | 2.429 | R |
| 34. | Jim McCormick (10) | 2.431 | R |
| 35. | George Bradley (11) | 2.434 | R |
| 36. | Terry Larkin (6) | 2.435 | R |
| 37. | Chief Bender+ (16) | 2.455 | R |
| 38. | Hooks Wiltse (12) | 2.471 | L |
| 39. | Sam Leever (13) | 2.473 | R |
| Lefty Leifield (12) | 2.473 | L | |
| 41. | Hippo Vaughn (13) | 2.486 | L |
| 42. | Bob Ewing (11) | 2.492 | R |
| 43. | Cy Morgan (10) | 2.509 | R |
| 44. | Ray Collins (7) | 2.513 | L |
| 45. | Hoyt Wilhelm+ (21) | 2.523 | R |
| 46. | Lew Richie (8) | 2.536 | R |
| 47. | Noodles Hahn (8) | 2.546 | L |
| 48. | George Zettlein (6) | 2.547 | R |
| 49. | Frank Owen (8) | 2.552 | R |
| 50. | Pete Alexander+ (20) | 2.560 | R |
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