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 | (dynasty) | 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. | Pagan, Emilio | (rreebe916) | PT Giants | 36 |
| 6. | Garcia, Yimi | (canseco) | Santa Clara CPU’s | 36 |
| 7. | Hader, Josh | (mattholland1975) | West Michigan Whitecaps | 36 |
| 8. | Garcia, Yimi | (Rezyboy30) | Jacksonville Pumas | 35 |
| 9. | Pagan, Emilio | Grand Forks Piggly Wigglys | 35 | |
| 10. | Hader, Josh | (habsco) | Albuquerque Blue Crystals | 35 |
| 11. | Workman, Brandon | (413693) | 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 | (electro) | Hazzard county Duke Boys | 33 |
| 16. | Castillo, Jose | (mintwinsfan) | Fred Flinstoners | 33 |
| 17. | Lorenzen, Michael | (habsco) | Los Angeles Angels | 32 |
| 18. | Gallegos, Giovanny | (habsco) | Los Angeles Angels | 32 |
| 19. | Kelley, Shawn | (donnpall) | Las Vegas Sun Sox | 32 |
| 20. | Green, Chad | Allerton Nine | 31 | |
| 21. | Leclerc, Jose | (rshah28) | Roanoke Renegades | 31 |
| 22. | Poche, Colin | (Jrobandsteal) | San Francisco G-Men | 30 |
| 23. | Pressly, Ryan | (habsco) | St Catharines Blues | 30 |
| 24. | Dominguez, Seranthony | (isondg) | Dowagiac Minnows | 30 |
| 25. | Workman, Brandon | (justin) | Gu1nne Toucans | 29 |
| 26. | Clippard, Tyler | (filler) | Raleigh Yellow Jackets | 28 |
| 27. | Verlander, Justin | (ColinBoucher) | Hesi Pull-Up Jimbos | 28 |
| 28. | Arrieta, Jake | (jeter0296) | Freehold Cardinals | 28 |
| 29. | Clippard, Tyler | (Jrobandsteal) | Quarantine City Chaos | 28 |
| 30. | Arrieta, Jake | (TC99) | Jackson 🐕🦺 Gluttons | 28 |
| 31. | Tiant, Luis | Washington DC Democrats | 28 | |
| 32. | Walsh, Ed | (filler) | Medical Marijuana | 28 |
| 33. | Robertson, David | (Jrobandsteal) | San Francisco G-Men | 28 |
| 34. | Ryan, Nolan | (CHoward48) | Springfield Spartans | 28 |
| 35. | Green, Chad | (AJHawk) | Hampton Roads Neptunes | 28 |
| 36. | Righetti, Dave | Oxford Blackhawks. 🦅 | 28 | |
| 37. | Pfiester, Jack | (Shpennymons) | New York Highlanders | 28 |
| 38. | Green, Chad | (BigRedMachine90) | Beating My Snake | 28 |
| 39. | Koufax, Sandy | Pooterville Hot Farts | 28 | |
| 40. | Kershaw, Clayton | (Jrobandsteal) | Pope Pius Pals | 28 |
| 41. | Johnson, Walter | (coachmcs) | Paris LIBERATORS | 28 |
| 42. | Ottavino, Adam | Geneva Golden Tornado | 28 | |
| 43. | Eldred, Cal | (mckarcher) | Portland Bounty | 28 |
| 44. | Walsh, Ed | (jamin) | Chester Springs Menjai | 28 |
| 45. | Walsh, Ed | (samwhitworth) | West Dakota Slime | 28 |
| 46. | Sutton, Don | (dbutts) | Brooklyn Atlantics | 28 |
| 47. | Walsh, Ed | (boetto) | Aurora Sealmasters | 27 |
| 48. | Walsh, Ed | (Bluesig) | Malaybalay Automatons | 27 |
| 49. | Weaver, Jered | (redbird63) | Missouri Magpies | 27 |
| 50. | Tiant, Luis | (WorcWarr) | Worcester Warriors | 27 |