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. | Martin, Chris | (coachmcs) | Philadelphia Phillies | 37 |
| 3. | Gallegos, Giovanny | (habsco) | Laurel Billings Bees | 37 |
| 4. | Pagan, Emilio | (LDJS1947) | ERIE SPARTANS | 36 |
| 5. | Garcia, Yimi | (Mick) | Chicago Pale hose | 36 |
| 6. | Pagan, Emilio | (aj1983) | St. Paul Snakes | 35 |
| 7. | Hader, Josh | (itchy008) | Albuquerque Blue Crystals | 35 |
| 8. | Garcia, Yimi | (gdavis32) | Los Angeles Nationals | 35 |
| 9. | Workman, Brandon | (dynasty) | San Fransisco Bulldogs | 34 |
| 10. | Castillo, Jose | (SteveBattaglio) | Union City Bashers | 33 |
| 11. | Poche, Colin | (yesman) | Brazzaville Gorille | 33 |
| 12. | Pressly, Ryan | (habsco) | St Catharines Blues | 30 |
| 13. | Poche, Colin | (Brenzini) | Oakmont Nibblers | 30 |
| 14. | Tiant, Luis | (rreebe916) | Philly Elephants | 28 |
| 15. | Koufax, Sandy | (brenzini) | Oakmont Dog Lovers | 28 |
| 16. | Righetti, Dave | Louisiana Politicians 💰 | 28 | |
| 17. | Eldred, Cal | (mckarcher) | Asoke Assassins | 28 |
| 18. | Clippard, Tyler | (filler8) | Raleigh Yellow Jackets | 28 |
| 19. | Walsh, Ed | (jamin) | Chester Springs Menjai | 28 |
| 20. | Anderson, Nick | (filler) | Dunder Mifflin Paper Company | 28 |
| 21. | Anderson, Nick | Chateau Les Duponts | 28 | |
| 22. | Clippard, Tyler | (filler) | Nantucket Coasters | 28 |
| 23. | Verlander, Justin | (ColinBoucher) | Hesi Pull-Up Jimbos | 28 |
| 24. | Sutton, Don | (Trulaia) | Henderson Hicks | 28 |
| 25. | Tiant, Luis | (nycubsfan) | Jackson Heights Knights | 28 |
| 26. | Martinez, Pedro | (TheVinci) | Southern Hurricanes | 28 |
| 27. | Arrieta, Jake | (broles) | New York Metro | 28 |
| 28. | Pfiester, Jack | (Shpennymons) | New York Highlanders | 28 |
| 29. | Kershaw, Clayton | (super) | Pope Pius Pals | 28 |
| 30. | Martinez, Pedro | (56Castle99) | Chenango Wolves | 28 |
| 31. | Greinke, Zack | (ThEiRoNhOrSe04) | Hoboken Zephyrs | 27 |
| 32. | Turner, Jim | (aaabob) | Windsor White's Other I's | 27 |
| 33. | Arrieta, Jake | (Mattholland1975) | Santa Fe Soldiers | 27 |
| 34. | Mathewson, Christy | (masimo29) | Iowa Corn Pickers | 27 |
| 35. | Verlander, Justin | (jamin) | Chester Springs Menjai | 27 |
| 36. | Gooden, Dwight | (PARATROOPER22) | DALLAS DONKEYS | 27 |
| 37. | Ford, Russ | (sytsmab) | Philly Elephants | 27 |
| 38. | Kershaw, Clayton | (dgeorgi) | WALLA WALLA WEASEL WACKERS | 27 |
| 39. | Walsh, Ed | (filler) | Singapore Blue Jays | 27 |
| 40. | Hader, Josh | (ColinBoucher) | Sycamore Street B.I.G’s | 27 |
| 41. | Peralta, Freddy | (Zigwiggity) | Toon Town Looney Tunes | 27 |
| 42. | Scott, Mike | (srv95112) | Chittenango Bears | 27 |
| 43. | Tiant, Luis | (jeter0296) | Freehold Yankees2 | 27 |
| 44. | Schilling, Curt | (JohnHeidy) | Hackensack Hawkeyes | 27 |
| 45. | Santana, Johan | (ClassicOs) | Baltimore Orioles | 27 |
| 46. | Tiant, Luis | Iowa Pigs | 27 | |
| 47. | Joss, Addie | (Shpennymons) | Chesapeake Oysters | 27 |
| 48. | Verlander, Justin | (michelb3514) | Iowa Corn Pickers | 27 |
| 49. | McNally, Dave | (richgibson) | California ConVICTedPadRES | 27 |
| 50. | Koufax, Sandy | (ScottCornelius) | Seattle Sockeyes | 27 |