Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Quality Starts)
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. | deGrom, Jacob | (sheus37393) | Correctionville Crusaders | 33 |
| 2. | DeLeon, Jose | (ILO-STL) | STL Silencers '80s | 32 |
| 3. | Koufax, Sandy | (nycubsfan) | Chicago Cubs | 32 |
| 4. | Scherzer, Max | (michelb3514) | Denver Eagles | 32 |
| 5. | Brown, Mordecai | (dynasty) | Montana Ducks | 32 |
| 6. | Greinke, Zack | (Weaver88) | Burlington Rhino | 32 |
| 7. | Guidry, Ron | (gibblets1973) | Badger Bulldogs | 32 |
| 8. | deGrom, Jacob | (Barr512) | Kirby Phucketts | 32 |
| 9. | deGrom, Jacob | (dynasty) | Arizona Suns | 32 |
| 10. | deGrom, Jacob | (tlambiase) | Frederick Blue Claws | 32 |
| 11. | deGrom, Jacob | (RichGibson) | Nat Turners REBELS | 31 |
| 12. | Maddux, Greg | (chaaad) | New York Magnolia BC | 31 |
| 13. | deGrom, Jacob | (RichGibson) | Lonely BLUEBOYS | 31 |
| 14. | deGrom, Jacob | (richgibson) | Tylers ANGELS | 31 |
| 15. | Johnson, Walter | (dynasty) | Denver Eagles | 31 |
| 16. | deGrom, Jacob | (markmac) | Sacramento Lions | 31 |
| 17. | deGrom, Jacob | (filler8) | Nevada Snakes | 31 |
| 18. | Clemens, Roger | (jeter0296) | Freehold Yankees | 31 |
| 19. | Clemens, Roger | (gibblets1973) | Greenspond Trail | 31 |
| 20. | deGrom, Jacob | (BAR23) | Memphis Yeti | 31 |
| 21. | Leonard, Dutch | (chaaad) | BX Bombers | 31 |
| 22. | Fujimoto, Hideo | (Old_Man) | Osaka Froghounds | 31 |
| 23. | Fernandez, Jose | Salem Demons | 31 | |
| 24. | Richard, J.R. | (rennies) | Eastpoint E-Gulls | 31 |
| 25. | deGrom, Jacob | (jamin) | Chester Springs Menjai | 31 |
| 26. | deGrom, Jacob | (WorcWarr) | Worcester Warriors | 31 |
| 27. | deGrom, Jacob | (Mortamar1966) | Kansas City Monarchs | 31 |
| 28. | deGrom, Jacob | (ScottCornelius) | Boston Bees | 31 |
| 29. | deGrom, Jacob | (RichGibson) | Flying SPAGHETTI MONSTERS | 31 |
| 30. | Scherzer, Max | (wduncan) | New York Bombas | 31 |
| 31. | Johnson, Walter | (tlambiase) | Frederick Blue Claws | 31 |
| 32. | deGrom, Jacob | (bigfoot77) | Minnesota Ruby Sox | 31 |
| 33. | deGrom, Jacob | (filler) | Charlotte Spiders | 31 |
| 34. | Martinez, Pedro | (Slothmonkey) | Boulder Cavemen | 31 |
| 35. | deGrom, Jacob | (Mortamar1966) | Ridge Harbor Lead Bellies | 31 |
| 36. | deGrom, Jacob | (filler) | Kentucky Horses | 31 |
| 37. | deGrom, Jacob | (hayzess) | Gilchrist Yellow Jackets | 31 |
| 38. | deGrom, Jacob | (gibblets1973) | Brooklyn Bulldogs | 31 |
| 39. | Guidry, Ron | (wduncan) | Panama City Sardines | 31 |
| 40. | Richard, J.R. | (rennies) | Eastpoint E-Gulls | 31 |
| 41. | Sugiuchi, Toshiya | (gibblets1973) | Bally Haly Bay Stars | 31 |
| 42. | deGrom, Jacob | (RichGibson) | Flying SPAGHETTI MONSTERS | 31 |
| 43. | McNally, Dave | (Loser63) | Forest Ballers | 30 |
| 44. | Richard, J.R. | (Cg4177) | Tacoma Tigers | 30 |
| 45. | Fernandez, Sid | (WorcWarr) | Worcester Warriors | 30 |
| 46. | Martinez, Pedro | (mattholland1975) | Homestead Smokestacks | 30 |
| 47. | Richard, J.R. | (bmilliron) | Tombstone Undertakers | 30 |
| 48. | Johnson, Randy | (kjcmeg13) | East Tennessee Titans | 30 |
| 49. | Walsh, Ed | (BAR23) | Raleigh Aces | 30 |
| 50. | Gooden, Dwight | (jeter0296) | Freehold Yanks | 30 |
