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. | McLain, Denny | (dunroche) | Chenango Wolves | 64 |
| 3. | Kluber, Corey | (dunroche) | Chenango Wolves | 64 |
| 4. | Haren, Dan | (zigwiggity) | RHODE ISLAND Shark Bite | 63 |
| 5. | Byrd, Paul | (mckarcher) | Helena Herbivores | 63 |
| 6. | Shields, James | (filler) | Miami Cats | 62 |
| 7. | Greinke, Zack | (fps1956) | OBX Pirates | 62 |
| 8. | Wells, David | (dynasty) | Nesconset Nasties | 61 |
| 9. | Jenkins, Fergie | (filler) | Big papa Kekumbas | 61 |
| 10. | Sheets, Ben | (filler8) | El Paso Masters | 60 |
| 11. | Lilly, Ted | Cooperstown Poodles | 59 | |
| 12. | Halladay, Roy | (filler8) | USF Bulls | 59 |
| 13. | Drysdale, Don | (Hbiz) | Esteli Northern Train | 59 |
| 14. | Santana, Johan | (dunroche) | Nevada Racin' Rebels | 58 |
| 15. | Koufax, Sandy | (jojomia) | BELMONT PATRIOTS | 58 |
| 16. | Plesac, Zach | (DodgerRon51) | Cleveland Indians | 58 |
| 17. | Hunter, Catfish | (WorcWarr) | Worcester Warriors | 58 |
| 18. | Greinke, Zack | (PicklePunk20) | Kenora Thistles | 58 |
| 19. | Wood, Wilbur | (relvinmelvin) | PVG Yellow Hats 2 | 58 |
| 20. | Sabathia, CC | (filler) | Joliet Slammers | 58 |
| 21. | Weaver, Jered | (babyave1) | York Angels | 58 |
| 22. | Carpenter, Chris | (Jbseeman) | MILLERSVILLE GREY WOLVES | 58 |
| 23. | Marichal, Juan | (XLVT) | WYOMING COWBOYS | 58 |
| 24. | Plesac, Zach | (itchy008) | Toronto Hawks | 58 |
| 25. | Gonzales, Marco | (DodgerRon51) | Cleveland Indians | 58 |
| 26. | DeSclafani, Anthony | (Sidneypointers) | Sidney K9s | 57 |
| 27. | Hendricks, Kyle | (donnpall) | Las Vegas Sun Sox | 57 |
| 28. | Greinke, Zack | (coachmcs) | Scottsdale Sun Devils | 57 |
| 29. | Chesbro, Jack | (brian4656) | Monticello Bean Bags | 57 |
| 30. | deGrom, Jacob | (griffeyga) | BB Bolts | 57 |
| 31. | Viola, Frank | (filler8) | Ballantine Blasts | 57 |
| 32. | Gooden, Dwight | (tgbsbl1967) | Newberry Hitmen | 57 |
| 33. | Vazquez, Javier | (jasonod202) | NothingYouDo MattersHere | 57 |
| 34. | Koufax, Sandy | (ranger) | HOUSTON TRAILRIDERS | 57 |
| 35. | DeSclafani, Anthony | (tda81) | Bison Brawlers | 57 |
| 36. | Kershaw, Clayton | (donnpall) | Las Vegas Sun Sox | 57 |
| 37. | Hudson, Daniel | (acr0320) | St. Paul Snakes | 57 |
| 38. | Colon, Bartolo | (dynasty) | san diego Chargers | 57 |
| 39. | Hunter, Catfish | (bostontex24) | Boston Celtics | 57 |
| 40. | Myers, Brett | (StrokersAces) | Stroker's Aces | 56 |
| 41. | Kershaw, Clayton | (zigwiggity) | South Dakota Killer Bears | 56 |
| 42. | Greinke, Zack | (Gradster10) | Sims Bulldogs | 56 |
| 43. | Jenkins, Fergie | (dynasty) | Greenhorn Valley | 56 |
| 44. | Santana, Johan | (dunroche) | Washington Racin' Rebels | 56 |
| 45. | Greinke, Zack | (Slothmonkey) | Phoenix Sting | 56 |
| 46. | Schilling, Curt | Village Old Guys | 56 | |
| 47. | Kershaw, Clayton | (bostontex24) | Boston Bald Eagles | 56 |
| 48. | Quintana, Jose | (filler8) | Miami Cats | 56 |
| 49. | Hunter, Catfish | (DaveH) | Lads0n C0ugars | 56 |
| 50. | Montas, Frankie | (befulton) | WF Black Dogs | 56 |