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 | (sethb33) | 78th Precinct Bulldogs | 71 |
| 2. | Koufax, Sandy | Kentucky Horses | 70 | |
| 3. | Cole, Gerrit | (rlapierre) | Iowa Corncobbs | 68 |
| 4. | Kluber, Corey | (walle-1) | Louisiana Gators | 68 |
| 5. | Marichal, Juan | (AR00) | Sideshow Bobs | 67 |
| 6. | Koufax, Sandy | (athlete4) | NASHVILLE NIGHT RIDERS | 67 |
| 7. | Hunter, Catfish | (AR00) | Sideshow Bobs | 64 |
| 8. | Kluber, Corey | Kentucky Horses | 64 | |
| 9. | McLain, Denny | Kentucky Horses | 64 | |
| 10. | Byrd, Paul | (filler8) | San Diego Sharks | 63 |
| 11. | Gibson, Bob | (athlete4) | NASHVILLE NIGHT RIDERS | 62 |
| 12. | Haren, Dan | (walle-1) | Boston Bees | 62 |
| 13. | Koufax, Sandy | (chaaad) | Weeksville Unknown | 62 |
| 14. | Haren, Dan | (sheus37393) | New York Boroughs Bridge Builders | 61 |
| 15. | Greinke, Zack | (walle-1) | Arizona Suns | 61 |
| 16. | Tanana, Frank | (cjisboss) | San Francisco SATELLITEOFLOVE | 61 |
| 17. | Sutton, Don | (walle-1) | Louisiana Gators | 61 |
| 18. | Moyer, Jamie | (tribetime89) | Texas Tornado | 61 |
| 19. | McLain, Denny | (chaaad) | Queensborough CC Tigers | 60 |
| 20. | Marichal, Juan | (chaaad) | BX Bombers | 60 |
| 21. | Wood, Wilbur | (Griff) | Desert City Drifters | 60 |
| 22. | Strider, Spencer | (JoeyT2870) | Cleveland Gladiators | 60 |
| 23. | Marichal, Juan | (chaaad) | Weeksville Unknown | 60 |
| 24. | Kluber, Corey | (AR00) | Sideshow Bobs | 60 |
| 25. | Colon, Bartolo | (bostontex24) | Boston Tomahawks | 60 |
| 26. | Marichal, Juan | (coachmcs) | Virginia Vibrators | 60 |
| 27. | Millwood, Kevin | (Luther) | Milwaukee Skeletons | 59 |
| 28. | Iwakuma, Hisashi | (walle-1) | Kentucky Horses | 59 |
| 29. | Radke, Brad | Utah Nightmares | 59 | |
| 30. | Marichal, Juan | (Rainman) | Carolina Bulldogs | 59 |
| 31. | Lilly, Ted | Toronto Tigers | 59 | |
| 32. | Marichal, Juan | (HoustonCougar) | Houston Colt 45's | 58 |
| 33. | Severino, Luis | (filler8) | Nevada Snakes | 58 |
| 34. | Wells, David | Baltimore Bulldogs | 58 | |
| 35. | Lilly, Ted | (walle-2) | Carolina Bulldogs | 58 |
| 36. | Tanana, Frank | (babyave1) | Naples Lakers | 58 |
| 37. | Santana, Johan | (chaaad) | Queensborough CC Tigers | 58 |
| 38. | Cueto, Johnny | (walle-1) | Louisiana Gators | 58 |
| 39. | Webb, Logan | Nevada Snakes | 58 | |
| 40. | Seaver, Tom | (Cg4177) | Cincinnati Silverbacks | 58 |
| 41. | Neagle, Denny | (walle-1) | Louisiana Gators | 58 |
| 42. | Marichal, Juan | (Crackpot) | Yachats 🍄Fun Guys🍄 | 58 |
| 43. | Kershaw, Clayton | (Myunclepunk) | Chicago Pounders | 57 |
| 44. | McNally, Dave | (sheus37393) | Cancun Chaos | 57 |
| 45. | Schmidt, Jason | (filler) | Seattle Sloths | 57 |
| 46. | Kluber, Corey | (Wileydog97) | Raleigh Grasshoppers | 57 |
| 47. | Perez, Pascual | (peteym17) | Baltimore Athletics | 57 |
| 48. | Cole, Gerrit | (sethb33) | 78th Precinct Bulldogs | 57 |
| 49. | Weaver, Jered | (Papa1014) | Chicago Reapers | 57 |
| 50. | Haren, Dan | (kjcmeg13) | Balmer Yard Birds | 57 |
