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. | James, Josh | (filler) | Dulac Mud Doggs | 15.3 |
| 2. | Giles, Ken | (ssrice123) | Kiev Dynamo | 15.1 |
| 3. | Kimbrel, Craig | (Erwin23) | Anaheim Angels | 15.2 |
| 4. | Barnes, Matt | Seattle Scooters | 15.2 | |
| 5. | Barnes, Matt | (offday) | Newfield Jiaolong | 15.0 |
| 6. | Neris, Hector | (hamburglar) | Werewolf Bar Mitzvahs | 14.9 |
| 7. | James, Josh | (kds4316) | Biloxi Blue Bombers | 15.2 |
| 8. | Diaz, Edwin | Stockton Stars | 15.0 | |
| 9. | Chapman, Aroldis | (tactracer) | Rainier Beeeerrrr | 14.8 |
| 10. | Knebel, Corey | (MLBNation) | Boston Speedsters | 14.9 |
| 11. | Leclerc, Jose | (tda81) | The Dangerous Alliance | 15.1 |
| 12. | Trivino, Lou | (Bigredmachine90) | Barboursville Bacon | 14.8 |
| 13. | Betances, Dellin | (babyave1) | House C Hurricanes | 14.9 |
| 14. | Giles, Ken | (tsiegler) | Ely Puppers | 14.8 |
| 15. | Wittgren, Nick | (mattholland1975) | Sarasota Sharks | 14.8 |
| 16. | Holland, Greg | (Sparky) | Rancho ⚾ld Timers | 14.6 |
| 17. | Hader, Josh | Heverling Hitmen | 14.6 | |
| 18. | Lidge, Brad | (timyoung) | Kansas City Monarchs | 14.8 |
| 19. | Barnes, Matt | (StoneAdams) | Dallas Cyclones | 14.5 |
| 20. | Hader, Josh | (tgbsbl1967) | Hawaii Volcanos | 14.8 |
| 21. | Barnes, Matt | (razaibi) | Vacaville Puggers | 14.5 |
| 22. | Fry, Jace | (filler) | Manhattan Golden Frogs | 14.6 |
| 23. | Hader, Josh | (Lostit) | Chicago Lost Cubs | 14.6 |
| 24. | Chapman, Aroldis | (dynasty) | Clubber Langs | 14.5 |
| 25. | Hader, Josh | (htennis) | The 100 Bellarkes | 14.5 |
| 26. | Knebel, Corey | (hitter) | Joshua’s Jets | 14.3 |
| 27. | Kimbrel, Craig | (jackfactor) | Bismarck Robbers | 14.4 |
| 28. | Capps, Carter | (Copp26) | Bartonsville Pumas | 14.4 |
| 29. | Hader, Josh | (sgt714) | Boston Americans XX | 14.3 |
| 30. | Strop, Pedro | (Sheffref) | New York Mets | 14.6 |
| 31. | Boxberger, Brad | (metschamp) | Miami Cats | 14.3 |
| 32. | Hader, Josh | (paybob21) | Pitty Crushers | 14.3 |
| 33. | Chapman, Aroldis | (befulton) | Home Cookin’ | 14.4 |
| 34. | Kimbrel, Craig | (fordjp) | Jokes On You Fighting Clowns | 14.3 |
| 35. | Knebel, Corey | Brooklyn Bulldogs | 14.3 | |
| 36. | Diaz, Edwin | (Twister2020) | Iowa City Twisters | 14.3 |
| 37. | Chapman, Aroldis | (JMNihon2327) | Cheeba Hawks | 14.3 |
| 38. | Anderson, Nick | Chicago Black Sox | 14.3 | |
| 39. | Kimbrel, Craig | (zoomersports) | Tamriel Templars | 14.3 |
| 40. | James, Josh | (filler) | Oak Park Aviators | 14.2 |
| 41. | Hader, Josh | (Youngerman78) | Bethlehem Bombers | 14.4 |
| 42. | Kahnle, Tommy | (dodgersnic) | Minnesota Snapping Ninja Turtles | 14.3 |
| 43. | Yates, Kirby | (djburton1261) | Rockford Riverhawks | 14.2 |
| 44. | Strop, Pedro | Bilbao Bulls | 14.2 | |
| 45. | Taylor, Josh | (Theguydude) | Minnesota Twins | 14.2 |
| 46. | Kimbrel, Craig | (mbeiser9999) | Maryville Bass | 14.2 |
| 47. | Wittgren, Nick | (goastros) | Lexington Sign Stealers | 14.2 |
| 48. | Hader, Josh | (BigRedMachine90) | Barboursville BATS | 14.2 |
| 49. | Miller, Andrew | (hamburglar) | Werewolf Bar Mitzvahs | 14.2 |
| 50. | Holland, Greg | (joshbonds25) | Little Jerrys | 14.2 |