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. | Kimbrel, Craig | (gamebreaker) | Acorn Bears 1-198 | 15.2 |
| 2. | Kimbrel, Craig | (malael) | New York Highlanders | 15.0 |
| 3. | Neris, Hector | (hamburglar) | Werewolf Bar Mitzvahs | 14.9 |
| 4. | Chapman, Aroldis | (tactracer) | Rainier Beeeerrrr | 14.8 |
| 5. | Knebel, Corey | (MLBNation) | Boston Speedsters | 14.9 |
| 6. | Betances, Dellin | (babyave1) | House C Hurricanes | 14.9 |
| 7. | Holland, Greg | (kingstreet) | Singapore Slingers | 14.6 |
| 8. | Hader, Josh | (jimgriddy) | Ellenton Barbanegras | 14.6 |
| 9. | Lidge, Brad | (timyoung) | Kansas City Monarchs | 14.8 |
| 10. | Uehara, Koji | (tsnets) | Boro Jokers | 14.5 |
| 11. | Hader, Josh | (tgbsbl1967) | Hawaii Volcanos | 14.8 |
| 12. | Fry, Jace | (Searcy) | Oklahoma Caribou | 14.6 |
| 13. | Hader, Josh | (Lostit) | Chicago Lost Cubs | 14.6 |
| 14. | Chapman, Aroldis | (baconfats) | Clubber Langs | 14.5 |
| 15. | Hader, Josh | (htennis) | The 100 Bellarkes | 14.5 |
| 16. | Knebel, Corey | (hitter) | Joshua’s Jets | 14.3 |
| 17. | Kimbrel, Craig | (Joshht16) | Monroe Cheesemakers | 14.4 |
| 18. | Capps, Carter | (filler) | Bartonsville Pumas | 14.4 |
| 19. | Hader, Josh | (mattholland1975) | Lone Tree Lions | 14.3 |
| 20. | Hader, Josh | (ironwill1) | Seattle Scooters | 14.3 |
| 21. | Edwards, Carl | (Zigwiggity) | Swimming in Circles | 14.4 |
| 22. | Chapman, Aroldis | National Senators 2019 | 14.4 | |
| 23. | Kimbrel, Craig | (chapman) | Jokes On You Fighting Clowns | 14.3 |
| 24. | Knebel, Corey | (Sheldon1976) | Westerville Fusion | 14.3 |
| 25. | Diaz, Edwin | (mudduck15) | Rochester Bulk | 14.3 |
| 26. | Chapman, Aroldis | (billw1975) | Guadalupe River Sun Demons | 14.3 |
| 27. | Kimbrel, Craig | (FastBoey) | South Dakota Shadows | 14.3 |
| 28. | James, Josh | (boomba) | Albuquerque Blue Crystals | 14.2 |
| 29. | Hand, Brad | (disneyboy9) | Towson Generals | 14.3 |
| 30. | Taylor, Josh | (superswatcop) | Minnesota Twins | 14.2 |
| 31. | Kimbrel, Craig | (mbeiser9999) | Maryville Bass | 14.2 |
| 32. | Miller, Andrew | (hamburglar) | Werewolf Bar Mitzvahs | 14.2 |
| 33. | Holland, Greg | (Trotz2) | Chicago Frisbees | 14.2 |
| 34. | Barnes, Matt | (moneymarv) | Carolina Cobra Kais | 14.2 |
| 35. | Diaz, Edwin | (mmeler) | Charleston Crabs | 14.3 |
| 36. | Kimbrel, Craig | (roguerouge) | Boston Terriers | 14.3 |
| 37. | Barnes, Matt | (BrooksBench) | Goose Creek Gators | 14.2 |
| 38. | Hader, Josh | (Bluesig) | Oroquieta Oliphaunts | 14.2 |
| 39. | Broxton, Jonathan | (BUCKLEYRM) | Oregon Eagles | 14.3 |
| 40. | Allen, Cody | (Chicos75) | Jamaica Blackmons | 14.1 |
| 41. | Kimbrel, Craig | (Charlie22) | DC Peeps | 14.2 |
| 42. | Knebel, Corey | (Sethvb) | Carolina Barnstormers | 14.3 |
| 43. | Diaz, Edwin | (baconfats) | Clubber Langs | 14.2 |
| 44. | Giles, Ken | (UNHBombers) | Stowe Bombers | 14.2 |
| 45. | Robertson, David | (Warrior) | San Antonio Suns | 14.1 |
| 46. | Betances, Dellin | (Bluesig) | Warihatag Wolves | 14.2 |
| 47. | Hader, Josh | (bfstevens) | Harper Park Hurricanes | 14.1 |
| 48. | Betances, Dellin | (LebronsHairline) | Buffalo Bulls | 14.0 |
| 49. | Hader, Josh | (Zigwiggity) | Suplexes Inside Of Duplexes | 14.0 |
| 50. | Chapman, Aroldis | (Hendu42) | David Spades | 14.2 |