Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Wins)
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. | Gallegos, Giovanny | Oklahoma Monarchs | 43 | |
| 2. | Petit, Yusmeiro | (habsco) | Laurel Billings Bees | 40 |
| 3. | Soria, Joakim | (habsco) | Tampa Terror | 38 |
| 4. | Gallegos, Giovanny | (habsco) | Laurel Billings Bees | 37 |
| 5. | Hader, Josh | (mattholland1975) | West Michigan Whitecaps | 36 |
| 6. | Garcia, Yimi | (Mick) | Chicago Pale hose | 36 |
| 7. | Pagan, Emilio | PT Giants | 36 | |
| 8. | Pagan, Emilio | (mattholland1975) | Pembroke Pigs | 35 |
| 9. | Hader, Josh | (itchy008) | Albuquerque Blue Crystals | 35 |
| 10. | Garcia, Yimi | Jacksonville Hemorrhage | 35 | |
| 11. | Workman, Brandon | (filler) | L'occitane Rhino | 34 |
| 12. | Treinen, Blake | (habsco) | Tampa Terror | 34 |
| 13. | Leclerc, Jose | (patchdillon) | Toronto Hawks | 34 |
| 14. | Dominguez, Seranthony | (mcvn4) | Yankeebb Kryptonite | 33 |
| 15. | Poche, Colin | Yuma Scorpions | 33 | |
| 16. | Castillo, Jose | Fred Flinstoners | 33 | |
| 17. | Kelley, Shawn | (donnpall) | Las Vegas Sun Sox | 32 |
| 18. | Leclerc, Jose | (filler) | Roanoke Renegades | 31 |
| 19. | Pressly, Ryan | (habsco) | St Catharines Blues | 30 |
| 20. | Dominguez, Seranthony | (mmeler) | Dowagiac Minnows | 30 |
| 21. | Poche, Colin | (mattholland1975) | Sarasota Gekkos | 30 |
| 22. | Workman, Brandon | (BlueJay) | Gu1nne Toucans | 29 |
| 23. | Sutton, Don | (dbutts) | Brooklyn Atlantics | 28 |
| 24. | Robertson, David | (mattholland1975) | Sarasota Gekkos | 28 |
| 25. | Walsh, Ed | (jamin) | Chester Springs Menjai | 28 |
| 26. | Clippard, Tyler | (filler) | Raleigh Yellow Jackets | 28 |
| 27. | Verlander, Justin | (ColinBoucher) | Hesi Pull-Up Jimbos | 28 |
| 28. | Arrieta, Jake | (DaveH) | Ladson RiverDogs | 28 |
| 29. | Tiant, Luis | Washington DC Democrats | 28 | |
| 30. | Pfiester, Jack | (Shpennymons) | New York Highlanders | 28 |
| 31. | Kershaw, Clayton | Pope Pius Pals | 28 | |
| 32. | Eldred, Cal | (mckarcher) | Asoke Assassins | 28 |
| 33. | Ottavino, Adam | Geneva Golden Tornado | 28 | |
| 34. | Walsh, Ed | Medical Marijuana | 28 | |
| 35. | Koufax, Sandy | (bishop427) | Los Angeles Syndicate | 28 |
| 36. | Clippard, Tyler | (Vernorama) | Nantucket Nine | 28 |
| 37. | Righetti, Dave | (turtlewurtle) | Oxford Blackhawks. 🦅 | 28 |
| 38. | Ryan, Nolan | (dynasty) | Springfield Spartans | 28 |
| 39. | Tiant, Luis | (WorcWarr) | Worcester Warriors | 27 |
| 40. | Pfiester, Jack | (BigRedMachine90) | Fan Of The Coch | 27 |
| 41. | Scherzer, Max | (Brianmorgan) | Cape Cod Steamersā¾ | 27 |
| 42. | Martinez, Pedro | Yorktown Senators | 27 | |
| 43. | Scott, Mike | (Arcticwolf) | Sand Hill Rd Cats | 27 |
| 44. | Alexander, Pete | (samwhitworth) | West Dakota Slime | 27 |
| 45. | Fernandez, Sid | (ClassicOs) | Baltimore Orioles | 27 |
| 46. | Hader, Josh | (mattholland1975) | Nashville Sounds | 27 |
| 47. | Santana, Johan | (ClassicOs) | Baltimore Orioles | 27 |
| 48. | Treinen, Blake | (Zigwiggity) | Rancho Cucamonga Quakes | 27 |
| 49. | Joss, Addie | (BigRedMachine90) | Fan Of The Coch | 27 |
| 50. | McNally, Dave | (jamin) | Chester Springs Menjai | 27 |