Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (SO/9)
| 1. | Kimbrel, Craig | Newark Bears | 15.2 | |
| 2. | Kimbrel, Craig | (malael) | New York Highlanders | 15.0 |
| 3. | Neris, Hector | (hamburglar) | Werewolf Bar Mitzvahs | 14.9 |
| 4. | Knebel, Corey | (sillymonkey) | San Jose Sharks | 14.9 |
| 5. | Betances, Dellin | (babyave1) | House C Hurricanes | 14.9 |
| 6. | Lidge, Brad | (timyoung) | Kansas City Monarchs | 14.8 |
| 7. | Uehara, Koji | (tsnets) | Boro Jokers | 14.5 |
| 8. | Fry, Jace | NC Stars | 14.6 | |
| 9. | Hader, Josh | (htennis) | The 100 Clarke and Bell | 14.5 |
| 10. | Kimbrel, Craig | (ThePort24) | Cresco Clashers | 14.4 |
| 11. | Hader, Josh | (tda81) | Altoona Rail Kings | 14.3 |
| 12. | Betances, Dellin | (NickHerbst3) | Starved Rockers | 14.3 |
| 13. | Edwards, Carl | (Bennyp420) | Las Vegas ASHBA's | 14.4 |
| 14. | Chapman, Aroldis | (ybn_francelit) | Seaside Heights Sand Travelers | 14.4 |
| 15. | Kimbrel, Craig | (chapman) | Jokes On You Fighting Clowns | 14.3 |
| 16. | Kimbrel, Craig | (shane211) | South Dakota Shadows | 14.3 |
| 17. | Hand, Brad | (joemcg) | OC Prospectors | 14.3 |
| 18. | Kimbrel, Craig | (boomba) | Albuquerque Blue Crystals | 14.2 |
| 19. | Miller, Andrew | (hamburglar) | Werewolf Bar Mitzvahs | 14.2 |
| 20. | Holland, Greg | (Novotny34) | Chicago Frisbees | 14.2 |
| 21. | Diaz, Edwin | (mattholland1975) | Solomon Sharks | 14.3 |
| 22. | Kimbrel, Craig | (roguerouge) | Boston Terriers | 14.3 |
| 23. | Hader, Josh | (hoopdirt) | Fremont Huskies | 14.2 |
| 24. | Allen, Cody | (Lester) | Troy Trojans | 14.1 |
| 25. | Kimbrel, Craig | (Charlie22) | DC Peeps | 14.2 |
| 26. | Diaz, Edwin | (mattholland1975) | Glens Falls Dragons | 14.2 |
| 27. | Robertson, David | (Warrior) | San Antonio Suns | 14.1 |
| 28. | Betances, Dellin | (whtvr1973) | Burger Kings | 14.2 |
| 29. | Betances, Dellin | (Djay69_1999) | Buffalo Bulls | 14.0 |
| 30. | Clippard, Tyler | (ColinBoucher) | Derelict Winos | 14.1 |
| 31. | Betances, Dellin | (verocious530) | The Dirtynut | 14.0 |
| 32. | Knebel, Corey | (rshepherd) | Island Coast Gators | 14.1 |
| 33. | Betances, Dellin | (kman) | Bedrock Water Buffalo | 14.2 |
| 34. | Givens, Mychal | (mrblacksd) | Portland Pioneers | 14.1 |
| 35. | Kimbrel, Craig | (Gradster10) | Counsells Crushers | 13.9 |
| 36. | Kimbrel, Craig | (Trulaia) | Collinsville Cobras | 13.9 |
| 37. | Betances, Dellin | (Consigliere33) | Chicago Cubs | 14.0 |
| 38. | Betances, Dellin | (mattholland1975) | Galena Eagles | 14.0 |
| 39. | Kimbrel, Craig | (joemcg) | OC Prospectors | 14.0 |
| 40. | Hader, Josh | (mattholland1975) | Durango Devils | 14.0 |
| 41. | Miller, Andrew | (LTD) | Detroit Tigers | 13.9 |
| 42. | Chapman, Aroldis | (GusPC13) | Pangaea Knights | 13.9 |
| 43. | Chapman, Aroldis | (Dougowen1) | Seattle Pilots | 13.9 |
| 44. | Betances, Dellin | NC Dawgs | 13.9 | |
| 45. | Jansen, Kenley | (mmeler) | Burg Bonzos | 13.9 |
| 46. | Betances, Dellin | (dieselduro) | Havana Hurricanes | 14.0 |
| 47. | Oh, Seung-hwan | (TheSyndicate) | Clubber Langs | 14.0 |
| 48. | Lidge, Brad | (teamkev24) | Sonoma Coast Sharks | 13.8 |
| 49. | Goody, Nick | (athlete4) | Pittsburgh Pirates | 13.8 |
| 50. | Diaz, Edwin | (habsco) | Chicago Cub | 13.9 |