Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (SO/9)
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. | Karinchak, James | (LDJS1947) | TORONTO BLUEJAYS | 15.9 |
| 2. | Williams, Devin | (jaredhamann) | ST. LOIUS BLUES | 15.8 |
| 3. | McGee, Jake | (Lostit) | Chicago Lost Cubs | 15.9 |
| 4. | Matzek, Tyler | (everett) | Raton River Rats | 15.6 |
| 5. | Diaz, Edwin | (PittPirates) | Fresno Rumble Ponies | 15.4 |
| 6. | Hader, Josh | (acr0320) | Batavia Muckdogs | 15.3 |
| 7. | Pagan, Emilio | (Ginkster) | Georgia Gooses | 15.6 |
| 8. | May, Trevor | (Tycobb555555) | Binghampton Bulls | 15.4 |
| 9. | Holland, Greg | (Barr512) | St-Jerome Cards | 15.2 |
| 10. | Hudson, Daniel | (dom1134157) | San Francisco Demons | 15.0 |
| 11. | Williams, Devin | (natsfan0012) | BB Bumble Bees | 14.9 |
| 12. | Chapman, Aroldis | (jefffreyb) | Chicago Mence | 15.0 |
| 13. | Rosenthal, Trevor | (Mrploppie) | Dalston Grizzlies | 15.2 |
| 14. | Hudson, Daniel | (gdavis32) | 2022 Flunkies | 14.9 |
| 15. | Hader, Josh | (Sgt714) | Boston Red Sox | 14.9 |
| 16. | Williams, Devin | (joemcg) | OC Ducks | 15.0 |
| 17. | Chapman, Aroldis | (Epitome31) | INDIANA BOMBERS | 14.9 |
| 18. | Rosenthal, Trevor | (Moosejaa) | Heritage Pointers | 14.9 |
| 19. | May, Trevor | (snnoopdu) | Hilltop Tornados | 14.8 |
| 20. | Adams, Austin | (ColinBoucher) | Dunning Kruger Dotards | 14.8 |
| 21. | Diaz, Edwin | (drh4740) | Vancouver Elephants | 14.8 |
| 22. | Peralta, Freddy | (LDJS1947) | SEMO REDHAWKS | 14.9 |
| 23. | Marshall, Evan | (jlojr06) | Salem Sorcerers | 14.8 |
| 24. | Anderson, Nick | San Diego Eels | 14.8 | |
| 25. | Kimbrel, Craig | (iceman18) | New York Metropolitians | 14.9 |
| 26. | Williams, Devin | (Hozsux69) | Jacksonville Bulldogs | 14.7 |
| 27. | Reyes, Alex | San Diego Eels | 14.8 | |
| 28. | May, Trevor | (filler2) | Fred Flinstoners | 14.9 |
| 29. | Williams, Devin | (jim2miller) | Daytona Hammerheads | 14.7 |
| 30. | Barnes, Matt | (jim2miller) | Daytona Hammerheads | 14.7 |
| 31. | Hendriks, Liam | (sunnybunny) | Carolina Reapers | 14.8 |
| 32. | Garrett, Amir | (filler2) | Fred Flinstoners | 14.8 |
| 33. | Parker, Blake | (natsfan0012) | Brooklyn Aces | 14.8 |
| 34. | Chapman, Aroldis | (coachmcs) | Truth Seekers | 14.6 |
| 35. | Capps, Carter | (edgwords1) | Abner Doubledaze | 14.6 |
| 36. | Hendriks, Liam | (coachmcs) | Wyoming Wasps | 14.6 |
| 37. | Chapman, Aroldis | (filler) | Los Angeles Dodgers | 14.7 |
| 38. | Diaz, Edwin | (filler8) | City Team Namers | 14.5 |
| 39. | Seanez, Rudy | (dynasty) | Long beach Rebels | 14.5 |
| 40. | Barnes, Matt | (jub) | Dallas Cyclones | 14.5 |
| 41. | Giles, Ken | (Willy1717) | Baltimore Burners | 14.5 |
| 42. | Brentz, Jake | (mattholland1975) | Buffalo Bison | 14.6 |
| 43. | Diaz, Edwin | (gpsman) | Victoria Knights | 14.5 |
| 44. | Rainey, Tanner | BOISE OTTERS | 14.6 | |
| 45. | Kimbrel, Craig | (michelb3514) | Iowa Corn Pickers | 14.5 |
| 46. | Kimbrel, Craig | (dom1134157) | Greensboro Gators | 14.5 |
| 47. | Hader, Josh | (Gurg33) | Everyday Workers | 14.6 |
| 48. | Yates, Kirby | (RichieBlondet) | New York Queens Kings | 14.6 |
| 49. | Williams, Devin | KENTUCKY KOALAS | 14.5 | |
| 50. | Hendriks, Liam | (natsfan0012) | BB Bumble Bees | 14.6 |