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. | Giles, Ken | (ssrice123) | Kiev Dynamo | 15.1 |
| 2. | Kimbrel, Craig | (cardchris36) | Acorn Bears 1-198 | 15.2 |
| 3. | Barnes, Matt | (gdavis32) | Seattle Scooters | 15.2 |
| 4. | Kimbrel, Craig | (malael) | New York Highlanders | 15.0 |
| 5. | Neris, Hector | (hamburglar) | Werewolf Bar Mitzvahs | 14.9 |
| 6. | Barnes, Matt | (gdavis32) | Anaheim Angels | 15.1 |
| 7. | James, Josh | (ironwill1) | Biloxi Blue Bombers | 15.2 |
| 8. | Diaz, Edwin | Adirondack Alpineers | 15.0 | |
| 9. | Chapman, Aroldis | (tactracer) | Rainier Beeeerrrr | 14.8 |
| 10. | Knebel, Corey | (MLBNation) | Boston Speedsters | 14.9 |
| 11. | Hader, Josh | (Larrnell17) | Windsor Wild Cats | 14.8 |
| 12. | Betances, Dellin | (babyave1) | House C Hurricanes | 14.9 |
| 13. | Barnes, Matt | (BilliamWilson) | Green Bay Spirit | 14.7 |
| 14. | Holland, Greg | (kingstreet) | Singapore Slingers | 14.6 |
| 15. | Hader, Josh | Fake Edition | 14.6 | |
| 16. | Lidge, Brad | (timyoung) | Kansas City Monarchs | 14.8 |
| 17. | Uehara, Koji | (tsnets) | Boro Jokers | 14.5 |
| 18. | Hader, Josh | (tgbsbl1967) | Hawaii Volcanos | 14.8 |
| 19. | Barnes, Matt | (Donnie23) | Jersey City Buzzkill | 14.5 |
| 20. | Fry, Jace | Ny Mets | 14.6 | |
| 21. | Hader, Josh | (Lostit) | Chicago Lost Cubs | 14.6 |
| 22. | Chapman, Aroldis | (amchug21) | Clubber Langs | 14.5 |
| 23. | Hader, Josh | (htennis) | The 100 Bellarkes | 14.5 |
| 24. | Knebel, Corey | (hitter) | Joshua’s Jets | 14.3 |
| 25. | Kimbrel, Craig | (jackfactor) | Bismarck Robbers | 14.4 |
| 26. | Capps, Carter | (gjenkins05) | Bartonsville Pumas | 14.4 |
| 27. | Hader, Josh | (mattholland1975) | Lone Tree Lions | 14.3 |
| 28. | Strop, Pedro | (iceman18) | New York Mets | 14.6 |
| 29. | Boxberger, Brad | (ab1121) | Miami Cats | 14.3 |
| 30. | Hader, Josh | (paybob21) | Pitty Crushers | 14.3 |
| 31. | Edwards, Carl | (Zigwiggity) | Swimming in Circles | 14.4 |
| 32. | Chapman, Aroldis | (befulton) | Home Cookin’ | 14.4 |
| 33. | Kimbrel, Craig | (fordjp) | Jokes On You Fighting Clowns | 14.3 |
| 34. | Knebel, Corey | Toledo Mighty Hens 2 | 14.3 | |
| 35. | Diaz, Edwin | (mudduck15) | Fletchers Lake Fatlephants | 14.3 |
| 36. | Chapman, Aroldis | (jfk) | Lisle Dream Crushers | 14.3 |
| 37. | Kimbrel, Craig | (Heartdoc) | Tamriel Templars | 14.3 |
| 38. | James, Josh | Albuquerque Blue Crystals | 14.2 | |
| 39. | Hand, Brad | (krallel) | Towson Generals | 14.3 |
| 40. | Hader, Josh | (manofbaseball) | Kansas City Panthers | 14.3 |
| 41. | Taylor, Josh | (superswatcop) | Minnesota Twins | 14.2 |
| 42. | Strop, Pedro | (mattholland1975) | Bilbao Bulls | 14.2 |
| 43. | Kimbrel, Craig | (mbeiser9999) | Maryville Bass | 14.2 |
| 44. | Hader, Josh | (BigRedMachine90) | Barboursville BATS | 14.2 |
| 45. | Miller, Andrew | (hamburglar) | Werewolf Bar Mitzvahs | 14.2 |
| 46. | Holland, Greg | (Trotz2) | Chicago Frisbees | 14.2 |
| 47. | Barnes, Matt | (doceagle) | Batavia Muck Dogs | 14.2 |
| 48. | Diaz, Edwin | Keystone Pioneers | 14.3 | |
| 49. | Kimbrel, Craig | (roguerouge) | Boston Terriers | 14.3 |
| 50. | Barnes, Matt | (Halofire) | Staten Island Wolves | 14.2 |