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 | (lasershow) | Big Lion | 15.0 |
| 3. | Hendriks, Liam | (Blackbeard) | Twinsburg Trojans | 14.8 |
| 4. | Hendriks, Liam | (Raidermike) | San Antonio Hornets | 14.6 |
| 5. | Bautista, Félix | (coachmcs) | Iowa Fighting Pigs | 14.5 |
| 6. | Boxberger, Brad | (brian4656) | Asheville Aces | 14.5 |
| 7. | Kimbrel, Craig | (filler) | Greensboro Gators | 14.5 |
| 8. | Hader, Josh | (walle-1) | Everyday Workers | 14.6 |
| 9. | Diaz, Edwin | (hanson) | North Third Blue Sox | 14.4 |
| 10. | Chapman, Aroldis | (filler) | Brooklyn Bats | 14.3 |
| 11. | Diaz, Edwin | (Grw3) | Hartford Hot Rods | 14.4 |
| 12. | Kimbrel, Craig | (filler) | TEXAS LONGHORNS | 14.3 |
| 13. | Diaz, Edwin | (Upenn29) | New York Vipers | 14.3 |
| 14. | Williams, Devin | (filler8) | Michigan Battle Toads | 14.3 |
| 15. | Yates, Kirby | (dynasty) | Montauk Blues | 14.3 |
| 16. | Kimbrel, Craig | (Texashorns2023) | East Texas Loggers | 14.2 |
| 17. | Chapman, Aroldis | Piggsburgh PigSnouts | 14.2 | |
| 18. | Hader, Josh | (KOOGS) | San Antonio Cats | 14.1 |
| 19. | Diaz, Edwin | (walle-1) | Arizona Wranglers | 14.2 |
| 20. | Iglesias, Raisel | (Coach_Boots) | Newmarket Stingers | 14.3 |
| 21. | Sims, Lucas | (govols1975) | Nebraska Huskers | 14.2 |
| 22. | Barnes, Matt | (finalbody) | Wilb’s 2nd Tough and Means | 14.1 |
| 23. | Hader, Josh | (ColinBoucher) | Derelict Winos | 14.2 |
| 24. | Williams, Devin | (BAR23) | Boston Bees | 14.1 |
| 25. | Diaz, Edwin | (Texashorns2023) | Tacoma Rainiers | 14.1 |
| 26. | Thornburg, Tyler | (michelb3514) | Iowa Corn Pickers | 14.1 |
| 27. | Hader, Josh | (dynasty8) | Detroit Sluggers | 14.2 |
| 28. | Rogers, Taylor | (salukisam) | Saluki Slick | 14.2 |
| 29. | Diaz, Edwin | (Alphabravo) | BUDWEISER CLYDESDALES | 14.0 |
| 30. | Kimbrel, Craig | (filler) | TAMPA BAY GATORS | 14.1 |
| 31. | Thielbar, Caleb | (dynasty8) | Puerto Vallarta Big Shots | 14.1 |
| 32. | Hendriks, Liam | Jacobs Cubs | 14.0 | |
| 33. | Lidge, Brad | (walle-1) | Charlottesville Crackers | 14.0 |
| 34. | Kimbrel, Craig | (ressien) | LA Top Guns | 14.2 |
| 35. | Sewald, Paul | (hanson) | Salem Sorcerers | 14.1 |
| 36. | Giles, Ken | (sgt714) | Boston Red Sox | 14.0 |
| 37. | Williams, Devin | (Upenn29) | Bristol Bulldogs | 14.0 |
| 38. | Kimbrel, Craig | (BAR23) | JERSEY HIGH ROLLERS | 14.1 |
| 39. | Sewald, Paul | Dallas Steers | 14.0 | |
| 40. | Karinchak, James | (walle-1) | Tampa bay Storm | 14.0 |
| 41. | Kimbrel, Craig | (richp) | Killer Bees | 14.0 |
| 42. | Kimbrel, Craig | (finalbody) | Amelia Tigers | 14.0 |
| 43. | Kimbrel, Craig | (Davis387) | Pawtucket WooSox | 14.0 |
| 44. | Williams, Devin | JERSEY VETS | 14.0 | |
| 45. | Hader, Josh | (walle-2) | Staten Island Knights | 13.9 |
| 46. | Kimbrel, Craig | (bigror25) | Canarsie Canibals | 14.1 |
| 47. | Brebbia, John | (dynasty) | Revelstoke Waxwings | 14.0 |
| 48. | Chapman, Aroldis | (ressien) | Elk Grove Dodgers | 14.0 |
| 49. | Sewald, Paul | (doughboys) | Montreal Royale | 13.9 |
| 50. | Kimbrel, Craig | (dynasty) | Anaheim Angels | 13.9 |
