Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (SO/9)
| 1. | Kimbrel, Craig | (cmm2003) | Newark Bears | 15.2 |
| 2. | Kimbrel, Craig | (malael) | New York Highlanders | 15.0 |
| 3. | Neris, Hector | Las Vegas Alcoholics | 14.9 | |
| 4. | Knebel, Corey | (doittoitlars) | Arizona Mustangs | 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 | (jaredhamann) | NC Stars | 14.6 |
| 9. | Hader, Josh | (gdavis32) | Milwaukee Bandits | 14.5 |
| 10. | Kimbrel, Craig | (ThePort24) | Cresco Clashers | 14.4 |
| 11. | Hader, Josh | Altoona Rail Kings | 14.3 | |
| 12. | Betances, Dellin | Starved Rockers | 14.3 | |
| 13. | Edwards, Carl | (shermanator) | Las Vegas ASHBA's | 14.4 |
| 14. | Chapman, Aroldis | (Ralthrus) | Seaside Heights Sand Travelers | 14.4 |
| 15. | Kimbrel, Craig | (chapman) | Jokes On You Fighting Clowns | 14.3 |
| 16. | Kimbrel, Craig | (JStone) | Minnesota Froggers | 14.3 |
| 17. | Hand, Brad | (joemcg) | OC Prospectors | 14.3 |
| 18. | Kimbrel, Craig | (boomba) | Albuquerque Blue Crystals | 14.2 |
| 19. | Miller, Andrew | Las Vegas Alcoholics | 14.2 | |
| 20. | Holland, Greg | (Novotny34) | Chicago Frisbees | 14.2 |
| 21. | Kimbrel, Craig | (roguerouge) | Boston Terriers | 14.3 |
| 22. | Hader, Josh | (hoopdirt) | Fremont Huskies | 14.2 |
| 23. | Allen, Cody | (Lester) | Troy Trojans | 14.1 |
| 24. | Kimbrel, Craig | (Charlie22) | DC Peeps | 14.2 |
| 25. | Robertson, David | (Warrior) | San Antonio Suns | 14.1 |
| 26. | Betances, Dellin | Burger Kings | 14.2 | |
| 27. | Betances, Dellin | (JHarkins) | Saskatchewan Stingers | 14.0 |
| 28. | Clippard, Tyler | (ColinBoucher) | Derelict Winos | 14.1 |
| 29. | Betances, Dellin | The Dirtynut | 14.0 | |
| 30. | Knebel, Corey | (hoopdirt) | Island Coast Gators | 14.1 |
| 31. | Betances, Dellin | Bedrock Water Buffalo | 14.2 | |
| 32. | Givens, Mychal | (shermanator) | Montreal Expos | 14.1 |
| 33. | Kimbrel, Craig | (Gradster10) | Counsells Crushers | 13.9 |
| 34. | Kimbrel, Craig | (Trulaia) | Collinsville Cobras | 13.9 |
| 35. | Betances, Dellin | (Mromito) | Baseball Baseball | 14.0 |
| 36. | Kimbrel, Craig | (joemcg) | OC Prospectors | 14.0 |
| 37. | Hader, Josh | (mattholland1975) | Durango Devils | 14.0 |
| 38. | Miller, Andrew | (Bomber23) | Thurmont Tigers | 13.9 |
| 39. | Chapman, Aroldis | (GusPC13) | Pangaea Knights | 13.9 |
| 40. | Chapman, Aroldis | (sazam) | Seattle Pilots | 13.9 |
| 41. | Jansen, Kenley | Bitburg Bonzos | 13.9 | |
| 42. | Betances, Dellin | (dieselduro) | Havana Hurricanes | 14.0 |
| 43. | Oh, Seung-hwan | (baconfats) | Clubber Langs | 14.0 |
| 44. | Lidge, Brad | (teamkev24) | Sonoma Coast Sharks | 13.8 |
| 45. | Goody, Nick | Nippes Swingin‘ Bats | 13.8 | |
| 46. | Diaz, Edwin | (habsco) | Chicago Cub | 13.9 |
| 47. | Diaz, Edwin | (Frug) | Los Angeles Sharks | 13.8 |
| 48. | Doolittle, Sean | Detroit Gorillas | 13.7 | |
| 49. | Betances, Dellin | (Olwill) | Night Prowlers | 13.7 |
| 50. | Chapman, Aroldis | (habsco) | Kentucky Pirates | 13.8 |