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 | (Scottie) | Raleigh Tigers | 33 |
| 2. | Koufax, Sandy | (nycubsfan) | Chicago Cubs | 32 |
| 3. | Greinke, Zack | (Weaver88) | Burlington Rhino | 32 |
| 4. | DeLeon, Jose | (ILO-STL) | STL Silencers '80s | 32 |
| 5. | Brown, Mordecai | (dynasty) | Atlanta Gorillas | 32 |
| 6. | deGrom, Jacob | (Ask12Be1) | Texas Outlaws | 32 |
| 7. | Scherzer, Max | (michelb3514) | Denver Eagles | 32 |
| 8. | deGrom, Jacob | (tlambiase) | Frederick Blue Claws | 32 |
| 9. | Guidry, Ron | (gibblets1973) | Badger Bulldogs | 32 |
| 10. | deGrom, Jacob | (Barr512) | Montreal Royale | 32 |
| 11. | deGrom, Jacob | (RichGibson) | Flying SPAGHETTI MONSTERS | 31 |
| 12. | Scherzer, Max | (wduncan) | New York Bombas | 31 |
| 13. | Johnson, Walter | (Saints69) | Kentucky Horses | 31 |
| 14. | Johnson, Walter | (tlambiase) | Frederick Blue Claws | 31 |
| 15. | deGrom, Jacob | (filler) | Salem Demons | 31 |
| 16. | deGrom, Jacob | (richgibson) | Lonely BLUEBOYS | 31 |
| 17. | deGrom, Jacob | (richgibson) | Tylers ANGELS | 31 |
| 18. | deGrom, Jacob | (jamin) | Chester Springs Menjai | 31 |
| 19. | Sugiuchi, Toshiya | (gibblets1973) | Bally Haly Bay Stars | 31 |
| 20. | deGrom, Jacob | (RichGibson) | Flying SPAGHETTI MONSTERS | 31 |
| 21. | deGrom, Jacob | (walle-1) | Phoenix Dragons | 31 |
| 22. | Richard, J.R. | (BAR23) | Pittsburgh Plunder | 31 |
| 23. | Fernandez, Jose | (dynasty) | Milwaukee Skeletons | 31 |
| 24. | Clemens, Roger | (gibblets1973) | Greenspond Trail | 31 |
| 25. | Richard, J.R. | (BAR23) | Pittsburgh Plunder | 31 |
| 26. | Martinez, Pedro | (filler) | Boulder Cavemen | 31 |
| 27. | deGrom, Jacob | (Mortamar1966) | Ridge Harbor Lead Bellies | 31 |
| 28. | deGrom, Jacob | (filler) | Salem Demons | 31 |
| 29. | deGrom, Jacob | (hayzess) | Gilchrist Yellow Jackets | 31 |
| 30. | deGrom, Jacob | (gibblets1973) | Brooklyn Bulldogs | 31 |
| 31. | Fujimoto, Hideo | Kansas Grasshoppers | 31 | |
| 32. | Guidry, Ron | (wduncan) | Panama City Sardines | 31 |
| 33. | deGrom, Jacob | (filler) | Dallas Mustangs | 31 |
| 34. | Maddux, Greg | (chaaad) | New York Magnolia BC | 31 |
| 35. | deGrom, Jacob | (QWERTY00) | Boston Ruby Sox | 31 |
| 36. | deGrom, Jacob | Boston Bees | 31 | |
| 37. | deGrom, Jacob | (filler) | Sacramento Lions | 31 |
| 38. | Clemens, Roger | (jeter0296) | Freehold Yankees | 31 |
| 39. | deGrom, Jacob | (Artinshki) | Base Ball Classics | 30 |
| 40. | Buchholz, Clay | (lasershow) | American Patriots | 30 |
| 41. | Arrieta, Jake | (bl00dl1n3) | Arizona Suns | 30 |
| 42. | deGrom, Jacob | (Crackpot) | Yachats 🍄Fun Guys🍄 | 30 |
| 43. | deGrom, Jacob | (filler8) | Kansas Grasshoppers | 30 |
| 44. | Scherzer, Max | (dynasty) | Seattle Sloths | 30 |
| 45. | Nomo, Hideo | (dynasty) | Miami Serpents | 30 |
| 46. | deGrom, Jacob | (bravesroy) | Hawaii Eruptions | 30 |
| 47. | deGrom, Jacob | (chaaad) | Newark Peppers | 30 |
| 48. | deGrom, Jacob | (Artinshki) | Team Sucks Missed Draft | 30 |
| 49. | Fernandez, Jose | (dynasty) | Milwaukee Skeletons | 30 |
| 50. | Vazquez, Javier | Roosevelt Rhubarbs | 30 |
