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. | Petit, Yusmeiro | (habsco) | Laurel Billings Bees | 40 |
| 2. | Soria, Joakim | (habsco) | Tampa Terror | 38 |
| 3. | Martin, Chris | (coachmcs) | Philadelphia Phillies | 37 |
| 4. | Gallegos, Giovanny | (habsco) | Laurel Billings Bees | 37 |
| 5. | Garcia, Yimi | (Mick) | Chicago Pale hose | 36 |
| 6. | Pagan, Emilio | (tdanella) | Erie Spartans | 36 |
| 7. | Pagan, Emilio | (TrustInBill) | Pembroke Pigs | 35 |
| 8. | Garcia, Yimi | (tda81) | Los Angeles Nationals | 35 |
| 9. | Hader, Josh | (itchy008) | Albuquerque Blue Crystals | 35 |
| 10. | Treinen, Blake | (habsco) | Tampa Terror | 34 |
| 11. | Workman, Brandon | (dynasty) | L'occitane Rhino | 34 |
| 12. | Leclerc, Jose | Toronto Hawks | 34 | |
| 13. | Castillo, Jose | Kannapolis Cannon Ballers | 33 | |
| 14. | Poche, Colin | (filler) | New Haven Blue Coats | 33 |
| 15. | Pressly, Ryan | (habsco) | St Catharines Blues | 30 |
| 16. | Poche, Colin | (Brenzini) | Oakmont Nibblers | 30 |
| 17. | Arrieta, Jake | (filler) | New York Metro | 28 |
| 18. | Anderson, Nick | (8378150) | Erie Bat Eaters | 28 |
| 19. | Tiant, Luis | (rreebe916) | Philly Elephants | 28 |
| 20. | Eldred, Cal | (mckarcher) | Asoke Assassins | 28 |
| 21. | Walsh, Ed | (jamin) | Chester Springs Menjai | 28 |
| 22. | Verlander, Justin | (ColinBoucher) | Hesi Pull-Up Jimbos | 28 |
| 23. | Clippard, Tyler | (dynasty) | Raleigh Yellow Jackets | 28 |
| 24. | Koufax, Sandy | (brenzini) | Oakmont Dog Lovers | 28 |
| 25. | Kershaw, Clayton | (super) | Pope Pius Pals | 28 |
| 26. | Sutton, Don | (tmcarthur72) | Henderson Hicks | 28 |
| 27. | Young, Chris | (ClassicOs) | Baltimore Orioles | 28 |
| 28. | Righetti, Dave | (Diamond_Dodgers) | Oxford Blackhawks. 🦅 | 28 |
| 29. | Clippard, Tyler | (dynasty) | Nantucket Nihilists | 28 |
| 30. | Ottavino, Adam | (finalbody) | Philadelphia Bulldogs | 28 |
| 31. | Pfiester, Jack | (Shpennymons) | New York Highlanders | 28 |
| 32. | Scott, Mike | (filler) | Philly Elephants | 27 |
| 33. | McNally, Dave | (jamin) | Chester Springs Menjai | 27 |
| 34. | Walsh, Ed | (cubanlou) | Singapore Blue Jays | 27 |
| 35. | Arrieta, Jake | (mattholland1975) | Santa Fe Soldiers | 27 |
| 36. | Verlander, Justin | (michelb3514) | Iowa Corn Pickers | 27 |
| 37. | Gooden, Dwight | (PARATROOPER22) | DALLAS DONKEYS | 27 |
| 38. | Mathewson, Christy | (michelb3514) | Iowa Corn Pickers | 27 |
| 39. | Santana, Johan | (ClassicOs) | Baltimore Orioles | 27 |
| 40. | Greinke, Zack | (ThEiRoNhOrSe04) | Hoboken Zephyrs | 27 |
| 41. | Young, Cy | El Paso Chihuahuas | 27 | |
| 42. | Kershaw, Clayton | (dgeorgi) | WALLA WALLA WEASEL WACKERS | 27 |
| 43. | Martinez, Pedro | (Brenzini) | Oakmont Leftys | 27 |
| 44. | Alexander, Pete | (samwhitworth) | West Dakota Slime | 27 |
| 45. | Martinez, Pedro | (BUCKLEYRM) | That 70’s Team | 27 |
| 46. | Higuera, Teddy | (kingstreet) | Singapore Straits Tigers | 27 |
| 47. | Kluber, Corey | (Sidneypointers) | Broadlands Hawks | 27 |
| 48. | Stephenson, Robert | (joemcg) | Desert Diablos | 27 |
| 49. | Hader, Josh | (ColinBoucher) | Sycamore Street B.I.G’s | 27 |
| 50. | Fernandez, Sid | (ClassicOs) | Baltimore Orioles | 27 |