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 | (filler) | Toronto Tigers | 33 |
| 2. | deGrom, Jacob | (Tlambiase) | Frederick Blue Claws | 32 |
| 3. | Koufax, Sandy | (nycubsfan) | Chicago Cubs | 32 |
| 4. | Brown, Mordecai | (walle-1) | Utah Nightmares | 32 |
| 5. | Guidry, Ron | (gibblets1973) | Badger Bulldogs | 32 |
| 6. | DeLeon, Jose | (ILO-STL) | STL Silencers '80s | 32 |
| 7. | deGrom, Jacob | (Barr512) | Montreal Royale | 32 |
| 8. | deGrom, Jacob | (Swingindave) | LITTLE ROCK ALLEY DOGS | 32 |
| 9. | Greinke, Zack | (Weaver88) | Burlington Rhino | 32 |
| 10. | Scherzer, Max | (Klose_Call) | Burnham Old Posh | 32 |
| 11. | Fujimoto, Hideo | (filler) | Charlotte Spiders | 31 |
| 12. | deGrom, Jacob | (liddlefeat) | Cleveland Eries | 31 |
| 13. | Clemens, Roger | (jeter0296) | Freehold Yankees | 31 |
| 14. | Martinez, Pedro | (filler) | Arizona Suns | 31 |
| 15. | deGrom, Jacob | (Mortamar1966) | Ridge Harbor Lead Bellies | 31 |
| 16. | Richard, J.R. | Rochester Rage | 31 | |
| 17. | deGrom, Jacob | (richgibson) | Lonely BLUEBOYS | 31 |
| 18. | deGrom, Jacob | (filler) | Salem Demons | 31 |
| 19. | Johnson, Walter | (filler) | Arizona Suns | 31 |
| 20. | deGrom, Jacob | (Kaline65) | Charlotte Spiders | 31 |
| 21. | Fernandez, Jose | (louisfelix) | Boulder Cavemen | 31 |
| 22. | Sugiuchi, Toshiya | (gibblets1973) | Bally Haly Bay Stars | 31 |
| 23. | deGrom, Jacob | (richgibson) | Flying SPAGHETTI MONSTERS | 31 |
| 24. | deGrom, Jacob | (jamin) | Chester Springs Menjai | 31 |
| 25. | deGrom, Jacob | (richgibson) | Tylers ANGELS | 31 |
| 26. | Johnson, Walter | (Tlambiase) | Frederick Blue Claws | 31 |
| 27. | deGrom, Jacob | (DaveH) | Ladson Cougars | 31 |
| 28. | deGrom, Jacob | (Swingindave) | LITTLE ROCK RAIDERS | 31 |
| 29. | deGrom, Jacob | (filler8) | Kentucky Horses | 31 |
| 30. | deGrom, Jacob | (hayzess) | Gilchrist Yellow Jackets | 31 |
| 31. | deGrom, Jacob | (gibblets1973) | Brooklyn Bulldogs | 31 |
| 32. | Guidry, Ron | (wduncan) | Panama City Sardines | 31 |
| 33. | Richard, J.R. | Rochester Rage | 31 | |
| 34. | deGrom, Jacob | (filler) | Alaska Red Bears | 31 |
| 35. | deGrom, Jacob | (richgibson) | Flying SPAGHETTI MONSTERS | 31 |
| 36. | Scherzer, Max | (wduncan) | New York Bombas | 31 |
| 37. | Maddux, Greg | (chaaad) | New York Magnolia BC | 31 |
| 38. | Leonard, Dutch | (chaaad) | Queensborough CC Tigers | 30 |
| 39. | deGrom, Jacob | (dynasty) | Montana Ducks | 30 |
| 40. | Yoshimi, Kazuki | (sheikyerboudi) | Samurai Japan | 30 |
| 41. | Clement, Matt | (bfstevens) | Nordica Corners | 30 |
| 42. | deGrom, Jacob | (chaaad) | Cuban X-Giants | 30 |
| 43. | deGrom, Jacob | (filler) | Boulder Cavemen | 30 |
| 44. | Scherzer, Max | (filler) | Dallas Mustangs | 30 |
| 45. | Johnson, Randy | (SilverSteel34) | BC CamelToes | 30 |
| 46. | deGrom, Jacob | (Artinshki) | Base Ball Homers | 30 |
| 47. | Richard, J.R. | (chaaad) | New York Highlanders | 30 |
| 48. | deGrom, Jacob | (bdavids28) | Greasy Jungle | 30 |
| 49. | deGrom, Jacob | (sheikyerboudi) | Away Team Redshirts | 30 |
| 50. | Messersmith, Andy | (jeter0296) | Freehold Yankees | 30 |
