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 | (fps1956) | Blue Flames | 71 |
| 2. | Koufax, Sandy | (dynasty) | Pittsburgh Plunder | 70 |
| 3. | Cole, Gerrit | (walle-1) | Montana Ducks | 68 |
| 4. | Kluber, Corey | (walle-1) | Louisiana Gators | 68 |
| 5. | Marichal, Juan | (dynasty8) | Boulder Cavemen | 67 |
| 6. | Koufax, Sandy | NASHVILLE NIGHT RIDERS | 67 | |
| 7. | Hunter, Catfish | (dynasty8) | Boulder Cavemen | 64 |
| 8. | Kluber, Corey | (dynasty) | Pittsburgh Plunder | 64 |
| 9. | McLain, Denny | (dynasty) | Pittsburgh Plunder | 64 |
| 10. | Byrd, Paul | (Amorphis) | Wolf River Otters | 63 |
| 11. | Gibson, Bob | NASHVILLE NIGHT RIDERS | 62 | |
| 12. | Koufax, Sandy | (chaaad) | Weeksville Unknown | 62 |
| 13. | Haren, Dan | (finalbody) | Atlanta Gorillas | 62 |
| 14. | Greinke, Zack | Burnham Fighting Cats | 61 | |
| 15. | Haren, Dan | (athlete4) | Templar Knights | 61 |
| 16. | Moyer, Jamie | (tribetime89) | Texas Tornado | 61 |
| 17. | Tanana, Frank | (cjisboss) | San Francisco SatelliteOfLove | 61 |
| 18. | Sutton, Don | (walle-1) | Louisiana Gators | 61 |
| 19. | Colon, Bartolo | (bostontex24) | Boston Tomahawks | 60 |
| 20. | Kluber, Corey | (dynasty8) | Boulder Cavemen | 60 |
| 21. | McLain, Denny | (chaaad) | Queensborough CC Tigers | 60 |
| 22. | Marichal, Juan | (chaaad) | Weeksville Unknown | 60 |
| 23. | Wood, Wilbur | (Griff) | Desert City Drifters | 60 |
| 24. | Marichal, Juan | (coachmcs) | Virginia Vibrators | 60 |
| 25. | Marichal, Juan | (chaaad) | BX Bombers | 60 |
| 26. | Strider, Spencer | (JoeyT2870) | Cleveland Gladiators | 60 |
| 27. | Marichal, Juan | (filler) | Alaska Red Bears | 59 |
| 28. | Iwakuma, Hisashi | (dynasty8) | San Diego Sharks | 59 |
| 29. | Lilly, Ted | (walle-1) | Texas Outlaws | 59 |
| 30. | Radke, Brad | Minnesota Frogs | 59 | |
| 31. | Millwood, Kevin | (filler8) | Miami Serpents | 59 |
| 32. | Cueto, Johnny | (walle-1) | Louisiana Gators | 58 |
| 33. | Webb, Logan | (dynasty8) | Minnesota Frogs | 58 |
| 34. | Severino, Luis | (filler8) | Alaska Red Bears | 58 |
| 35. | Neagle, Denny | Montana Ducks | 58 | |
| 36. | Wells, David | (JG56) | Baltimore Crabs | 58 |
| 37. | Santana, Johan | (chaaad) | Queensborough CC Tigers | 58 |
| 38. | Seaver, Tom | (Cg4177) | Cincinnati Silverbacks | 58 |
| 39. | Marichal, Juan | (cmr123) | Yakima Spartans | 58 |
| 40. | Lilly, Ted | (walle-2) | Toronto Tigers | 58 |
| 41. | Tanana, Frank | (babyave1) | Naples Lakers | 58 |
| 42. | Marichal, Juan | (HoustonCougar) | Houston Colt 45's | 58 |
| 43. | Marichal, Juan | (dynasty) | Boulder Cavemen | 57 |
| 44. | Greinke, Zack | (nickachap) | Akron RubberDucks | 57 |
| 45. | Tanaka, Masahiro | (walle-1) | Utah Nightmares | 57 |
| 46. | Scott, Mike | (filler8) | Toronto Tigers | 57 |
| 47. | Marichal, Juan | (dynasty) | Kansas Grasshoppers | 57 |
| 48. | Weaver, Jered | Portland Vikings | 57 | |
| 49. | Perez, Pascual | (filler) | Alaska Red Bears | 57 |
| 50. | Kluber, Corey | (Slothmonkey) | Cleveland Cliffs | 57 |
