Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Homers Allowed)
Average
OBP
SLG
OPS
At Bats
Runs
Hits
Doubles
Triples
Homers
RBIs
Walks
Strikeouts
Stolen Bases
Caught Stealing
Sac Hits
Sac Fly
HBP
GIDP
D+/-
Wins
Losses
ERA
WHIP
Innings
Hits Allowed
HR Allowed
Walks (P)
Strikeouts (p)
Complete Games
Saves
Blown Saves
Shutouts
Quality Starts
Wild Pitches
Hit Batters
H/9
BB/9
SO/9
| 1. | Marichal, Juan | (dunroche) | Toledo Mudhens | 71 |
| 2. | Koufax, Sandy | (dunroche) | Chenango Wolves | 70 |
| 3. | Cole, Gerrit | (dunroche) | Washington Racin' Rebels | 68 |
| 4. | Kluber, Corey | (dunroche) | South Dakota Dragons | 68 |
| 5. | Marichal, Juan | (dunroche) | Philadelphia Sweet Dees | 67 |
| 6. | Koufax, Sandy | (dunroche) | Tuvalu Copras | 67 |
| 7. | Kluber, Corey | (dunroche) | Chenango Wolves | 64 |
| 8. | McLain, Denny | (dunroche) | Chenango Wolves | 64 |
| 9. | Hunter, Catfish | (dunroche) | Philadelphia Sweet Dees | 64 |
| 10. | Byrd, Paul | (kevin0gonzales) | Columbia Vikings | 63 |
| 11. | Gibson, Bob | (dunroche) | Tuvalu Copras | 62 |
| 12. | Haren, Dan | (filler) | Indiana Cubs | 62 |
| 13. | Koufax, Sandy | (dunroche) | Ohio Stealers | 62 |
| 14. | Sutton, Don | (dunroche) | South Dakota Dragons | 61 |
| 15. | Haren, Dan | (Bluejays2) | Boston Bees | 61 |
| 16. | Tanana, Frank | (filler8) | Big papa Kekumbas | 61 |
| 17. | Moyer, Jamie | (kevin0gonzales) | Texas Tornado | 61 |
| 18. | Greinke, Zack | (filler8) | Simsbury Cats | 61 |
| 19. | Colon, Bartolo | (bucketscentral) | Marietta Tomahawks | 60 |
| 20. | Sabathia, CC | (dynasty) | Jersey Jets | 60 |
| 21. | McLain, Denny | (dunroche) | Nevada Racin' Rebels | 60 |
| 22. | Strider, Spencer | (dynasty) | ARKANSAS SLAMMERS | 60 |
| 23. | Marichal, Juan | (dynasty8) | All-Valley Buzz | 60 |
| 24. | Marichal, Juan | (dunroche) | Ohio Stealers | 60 |
| 25. | Wood, Wilbur | (filler) | Desert City Drifters | 60 |
| 26. | Kluber, Corey | (dunroche) | Philadelphia Sweet Dees | 60 |
| 27. | Millwood, Kevin | (filler) | Flying Raptors | 59 |
| 28. | Lilly, Ted | (iceman18) | New York Mets | 59 |
| 29. | Radke, Brad | who let the wierdos out | 59 | |
| 30. | Iwakuma, Hisashi | (KCRockies) | Indiana Orioles | 59 |
| 31. | Marichal, Juan | (dunroche) | Toledo Mudhens | 59 |
| 32. | Seaver, Tom | (rowdy1982) | Marshall Young Herd | 58 |
| 33. | Marichal, Juan | (dynasty) | San diego Bulldogs | 58 |
| 34. | Marichal, Juan | (HoustonCougar) | Houston Colt 45's | 58 |
| 35. | Santana, Johan | (dunroche) | Nevada Racin' Rebels | 58 |
| 36. | Lilly, Ted | (filler8) | Tallahassee Lumberjacks | 58 |
| 37. | Tanana, Frank | (babyave1) | Naples Lakers | 58 |
| 38. | Neagle, Denny | (dynasty) | American Eagles | 58 |
| 39. | Severino, Luis | (filler8) | Tampa Tigers | 58 |
| 40. | Cueto, Johnny | (dunroche) | South Dakota Dragons | 58 |
| 41. | Webb, Logan | (filler8) | Limoilou Bankstealers | 58 |
| 42. | Haren, Dan | (Buckley) | B's Whitehall Vikings | 57 |
| 43. | Marichal, Juan | (MikeDrop0221) | REd RASCALS | 57 |
| 44. | McNally, Dave | (dunroche) | Detroit Tigers | 57 |
| 45. | Cole, Gerrit | (dunroche) | Toledo Mudhens | 57 |
| 46. | Marichal, Juan | Denver Bears | 57 | |
| 47. | Marichal, Juan | (bostontex24) | New England Lights Out | 57 |
| 48. | Kluber, Corey | (Slothmonkey) | Cleveland Cliffs | 57 |
| 49. | Perez, Pascual | (filler) | Miami Roid Rage | 57 |
| 50. | Scott, Mike | (hayzess) | Winston Bald Eagles | 57 |
