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. | Koufax, Sandy | (dunroche) | Chenango Wolves | 70 |
| 2. | Cole, Gerrit | (dunroche) | Washington Racin' Rebels | 68 |
| 3. | McLain, Denny | (dunroche) | Chenango Wolves | 64 |
| 4. | Kluber, Corey | (dunroche) | Chenango Wolves | 64 |
| 5. | Byrd, Paul | (everett) | Columbia Vikings | 63 |
| 6. | Greinke, Zack | Kellogs Crackle and Pop | 62 | |
| 7. | Haren, Dan | (filler8) | Indiana Cubs | 62 |
| 8. | Greinke, Zack | (filler) | Simsbury Cats | 61 |
| 9. | Wells, David | (dynasty) | Nesconset Nasties | 61 |
| 10. | Moyer, Jamie | (filler) | Texas Tornado | 61 |
| 11. | Marichal, Juan | (coachmcs) | Boston Big Bats | 60 |
| 12. | Sheets, Ben | (MikeDrop0221) | El Paso Masters | 60 |
| 13. | Colon, Bartolo | (abb) | Marietta Tomahawks | 60 |
| 14. | Wood, Wilbur | (TramFan) | Desert City Drifters | 60 |
| 15. | Sabathia, CC | (dynasty) | Jersey Jets | 60 |
| 16. | Lilly, Ted | (Mrploppie) | Cooperstown Poodles | 59 |
| 17. | Drysdale, Don | (salukisam) | Q City Quake | 59 |
| 18. | Marichal, Juan | (dunroche) | Toledo Mudhens | 59 |
| 19. | Halladay, Roy | (TramFan) | Desert City Drifters | 59 |
| 20. | Sabathia, CC | (Chowder129) | Bedrock Bashers | 58 |
| 21. | Marichal, Juan | (dynasty) | WYOMING COWBOYS | 58 |
| 22. | Plesac, Zach | (Texashorns2023) | Port Aramsas Greys | 58 |
| 23. | Tanana, Frank | (babyave1) | Naples Lakers | 58 |
| 24. | Gonzales, Marco | (Dash) | Vegas WildCards | 58 |
| 25. | Santana, Johan | (dunroche) | Nevada Racin' Rebels | 58 |
| 26. | Neagle, Denny | (dynasty) | American Eagles | 58 |
| 27. | Seaver, Tom | (BlueJays2) | Highland Hills Tigers | 58 |
| 28. | Lilly, Ted | (dynasty) | Tallahassee Lumberjacks | 58 |
| 29. | Weaver, Jered | (babyave1) | Atlantic Salmon | 58 |
| 30. | Carpenter, Chris | (dynasty) | MILLERSVILLE GREY WOLVES | 58 |
| 31. | Wood, Wilbur | (acr0320) | PVG Yellow Hats 2 | 58 |
| 32. | Scott, Mike | (BobbyCarnes) | Louisville Devils | 57 |
| 33. | Weaver, Jered | (dynasty) | Alabama Aces | 57 |
| 34. | Marichal, Juan | (LlyodMoseby) | Homestead Grays | 57 |
| 35. | DeSclafani, Anthony | (JustinTime420) | Boston Bees | 57 |
| 36. | Koufax, Sandy | (ranger) | FRANKLIN BENJAMINS | 57 |
| 37. | DeSclafani, Anthony | (JTExpress) | Sidney K9s | 57 |
| 38. | Jenkins, Fergie | MALIBU SURFERS | 57 | |
| 39. | Vazquez, Javier | Chilliwack Cougars | 57 | |
| 40. | Kershaw, Clayton | (Myunclepunk) | Chicago Pounders | 57 |
| 41. | Marichal, Juan | (MikeDrop0221) | Capital CIty Colonels | 57 |
| 42. | Kluber, Corey | (Vernorama) | Cleveland Cliffs | 57 |
| 43. | Jenkins, Fergie | (dynasty) | Greenhorn Valley | 56 |
| 44. | Santana, Johan | (dunroche) | Washington Racin' Rebels | 56 |
| 45. | Wacha, Michael | (filler) | Portland Bounty | 56 |
| 46. | Wells, David | (JustinTime420) | Lowell Raiders | 56 |
| 47. | Wells, David | (filler8) | Detroit Tigers | 56 |
| 48. | Greinke, Zack | (filler) | Phoenix Sting 🐝 | 56 |
| 49. | Higuera, Teddy | (PNeumann10) | Bluffin' Blasters | 56 |
| 50. | Marichal, Juan | (MikeDrop0221) | WF Greyhounds | 56 |