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 | (brian4656) | Batavia Muckdogs | 15.3 |
| 2. | Hudson, Daniel | San Francisco Demons | 15.0 | |
| 3. | Hader, Josh | (sgt714) | Boston Red Sox | 14.9 |
| 4. | Diaz, Edwin | (drh4740) | Vancouver Elephants | 14.8 |
| 5. | Hendriks, Liam | (ny2Dave) | Carolina Reapers | 14.8 |
| 6. | Chapman, Aroldis | (P-ItsBones) | Truth Seekers | 14.6 |
| 7. | Hendriks, Liam | (brettphillips35) | WYOMING WASPS | 14.6 |
| 8. | Diaz, Edwin | (Superheat51) | City Team Namers | 14.5 |
| 9. | Kimbrel, Craig | (dynasty) | Greensboro Gators | 14.5 |
| 10. | Hader, Josh | (filler2) | Everyday Workers | 14.6 |
| 11. | Yates, Kirby | (RichieBlondet) | New York Queens Kings | 14.6 |
| 12. | Diaz, Edwin | (hanson) | North Third Blue Sox | 14.4 |
| 13. | Hader, Josh | (filler) | Desert Jockeys | 14.5 |
| 14. | Chapman, Aroldis | (jmnihon2327) | Atlantean Thoth | 14.4 |
| 15. | Diaz, Edwin | (Grw3) | Hartford Hot Rods | 14.4 |
| 16. | Kimbrel, Craig | (jhong78) | Texas Darkhorns | 14.3 |
| 17. | Karinchak, James | (MaceGoblin) | Columbus Jets | 14.4 |
| 18. | Diaz, Edwin | (ny2Dave) | New York Bears | 14.3 |
| 19. | Williams, Devin | (itchy008) | Albuquerque Blue Crystals | 14.3 |
| 20. | Yates, Kirby | (Silas) | Montauk Blues | 14.3 |
| 21. | Kimbrel, Craig | (dynasty) | Washington Co. Wasps | 14.2 |
| 22. | Chapman, Aroldis | (ColinBoucher) | SoggyDollop HotWhistleFarts | 14.2 |
| 23. | Williams, Devin | (Dodger1973) | Miami Arachnids 🕷 | 14.2 |
| 24. | Diaz, Edwin | (Fernis46) | Arizona Wranglers | 14.2 |
| 25. | Iglesias, Raisel | (Coach_Boots) | Newmarket Stingers | 14.3 |
| 26. | Sims, Lucas | (dynasty8) | Philadelphia Phantoms | 14.2 |
| 27. | Barnes, Matt | (Relvinmelvin) | York Yoyos | 14.1 |
| 28. | Hader, Josh | (Kaline65) | Royal Hill Lions | 14.2 |
| 29. | Williams, Devin | (LDJS1947) | DALLAS SPURS | 14.1 |
| 30. | Diaz, Edwin | (iceman18) | New York Mets | 14.1 |
| 31. | Hader, Josh | Detroit Sluggers | 14.2 | |
| 32. | Williams, Devin | (Texashorns2023) | Cleburne Railroaders | 14.1 |
| 33. | Rogers, Taylor | (salukisam) | Saluki Slick | 14.2 |
| 34. | Diaz, Edwin | (Zigwiggity) | Sydney Sluggers | 14.0 |
| 35. | Kimbrel, Craig | (filler) | Camrose Kodiaks | 14.1 |
| 36. | Hendriks, Liam | (filler) | Jacobs Cubs | 14.0 |
| 37. | Kimbrel, Craig | CAPE GIARDEAU COUGARS | 14.2 | |
| 38. | Sewald, Paul | (hanson) | Salem Sorcerers | 14.1 |
| 39. | Williams, Devin | Joe Mama | 14.0 | |
| 40. | Kimbrel, Craig | (zigwiggity) | JERSEY HIGH ROLLERS | 14.1 |
| 41. | Chapman, Aroldis | (smoyer) | Seager Silver Bullets | 14.0 |
| 42. | Sewald, Paul | Dallas Steers | 14.0 | |
| 43. | Karinchak, James | (Tommyboy23) | Tampa bay Storm | 14.0 |
| 44. | Kimbrel, Craig | (mattholland1975) | King Kongs | 14.0 |
| 45. | Sims, Lucas | (JayHawkGamez) | BB Broncos | 14.0 |
| 46. | Kimbrel, Craig | Amelia Tigers | 14.0 | |
| 47. | Hader, Josh | (GLOBEXcorp) | GLOBEX Corporation | 14.0 |
| 48. | Kimbrel, Craig | (d-bags-ball) | Heritage Pointers | 14.0 |
| 49. | Williams, Devin | (Texashorns2023) | New York Mets | 14.0 |
| 50. | Hader, Josh | (gdavis32) | Black Creek Wolves | 13.9 |
