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. | Hader, Josh | (hanson) | Batavia Muckdogs | 15.3 |
| 2. | Hudson, Daniel | (filler) | Seoul KARD | 15.0 |
| 3. | Hendriks, Liam | (jim2miller) | Twinsburg Trojans | 14.8 |
| 4. | Hendriks, Liam | (gdavis32) | WYOMING WASPS | 14.6 |
| 5. | Diaz, Edwin | (muntschuss) | Brooklyn Blue Crew | 14.5 |
| 6. | Bautista, Félix | (coachmcs) | Iowa Fighting Pigs | 14.5 |
| 7. | Boxberger, Brad | (shelley71) | Asheville Aces | 14.5 |
| 8. | Kimbrel, Craig | (zrausch1) | Greensboro Gators | 14.5 |
| 9. | Hader, Josh | (dynasty8) | Everyday Workers | 14.6 |
| 10. | Diaz, Edwin | (hanson) | North Third Blue Sox | 14.4 |
| 11. | Chapman, Aroldis | (St0n3s) | Atlantean Thoth | 14.4 |
| 12. | Chapman, Aroldis | (FinauFederation) | Brooklyn Bats | 14.3 |
| 13. | Diaz, Edwin | (Grw3) | Hartford Hot Rods | 14.4 |
| 14. | Kimbrel, Craig | (LDJS1947) | TEXAS LONGHORNS | 14.3 |
| 15. | Diaz, Edwin | (alar6085) | New York Vipers | 14.3 |
| 16. | Williams, Devin | (Newjeans) | Pabst Blue Ribbons | 14.3 |
| 17. | Yates, Kirby | (Silas) | Montauk Blues | 14.3 |
| 18. | Kimbrel, Craig | (Texashorns2023) | East Texas Loggers | 14.2 |
| 19. | Chapman, Aroldis | (ColinBoucher) | SoggyDollop HotWhistleFarts | 14.2 |
| 20. | Hader, Josh | (HouAstros1986) | Pittsburgh Hammers | 14.1 |
| 21. | Diaz, Edwin | (FERNTASTIC1976) | Arizona Wranglers | 14.2 |
| 22. | Iglesias, Raisel | (Coach_Boots) | Newmarket Stingers | 14.3 |
| 23. | Sims, Lucas | (zrausch1) | Nebraska Huskers | 14.2 |
| 24. | Barnes, Matt | (zrausch1) | Wilb’s 2nd Tough and Means | 14.1 |
| 25. | Hader, Josh | (ColinBoucher) | Derelict Winos | 14.2 |
| 26. | Williams, Devin | (BAR23) | Boston Bees | 14.1 |
| 27. | Diaz, Edwin | (BAR23) | Tacoma Rainiers | 14.1 |
| 28. | Thornburg, Tyler | (michelb3514) | Iowa Corn Pickers | 14.1 |
| 29. | Hader, Josh | Detroit Sluggers | 14.2 | |
| 30. | Williams, Devin | (Trulaia) | Boston Bees | 14.1 |
| 31. | Rogers, Taylor | (salukisam) | Saluki Slick | 14.2 |
| 32. | Diaz, Edwin | (zrausch1) | Budweiser Clydesdales | 14.0 |
| 33. | Kimbrel, Craig | (Griff) | TAMPA BAY GATORS | 14.1 |
| 34. | Thielbar, Caleb | (Jbas524) | Bernards Gardening Bulldogs | 14.1 |
| 35. | Hendriks, Liam | (filler) | Jacobs Cubs | 14.0 |
| 36. | Lidge, Brad | Charlottesville Crackers | 14.0 | |
| 37. | Kimbrel, Craig | (dynasty8) | No Fly Zone | 14.2 |
| 38. | Sewald, Paul | (hanson) | Salem Sorcerers | 14.1 |
| 39. | Giles, Ken | (sgt714) | Boston Red Sox | 14.0 |
| 40. | Williams, Devin | Bristol Bulldogs | 14.0 | |
| 41. | Kimbrel, Craig | (MikeDrop0221) | JERSEY HIGH ROLLERS | 14.1 |
| 42. | Sewald, Paul | (PandyBoiiii) | Dallas Steers | 14.0 |
| 43. | Karinchak, James | Tampa bay Storm | 14.0 | |
| 44. | Kimbrel, Craig | (richp) | Killer Bees | 14.0 |
| 45. | Kimbrel, Craig | (dynasty) | Amelia Tigers | 14.0 |
| 46. | Kimbrel, Craig | (ffgamer71) | Balmer Yardbirds | 14.0 |
| 47. | Williams, Devin | (zrausch1) | JERSEY VETS | 14.0 |
| 48. | Hader, Josh | (gdavis32) | Staten Island Knights | 13.9 |
| 49. | Kimbrel, Craig | (bigror25) | Canarsie Canibals | 14.1 |
| 50. | Brebbia, John | Revelstoke Waxwings | 14.0 |
