Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (H/9)
| 1. | Robertson, David | (Fireballers) | Destin Snowbirds | 1.4 |
| 2. | Feliz, Neftali | (sgt714) | Boston Americans III | 1.5 |
| 3. | Boxberger, Brad | (chaaad) | Stony Brook Seawolves | 1.7 |
| 4. | Hand, Brad | Hampstead Hogs | 1.9 | |
| 5. | Harris, Will | Sorrento Capras | 1.9 | |
| 6. | Jansen, Kenley | (vaughnk003) | Wilmington Mohawks | 1.9 |
| 7. | Bottalico, Ricky | (jim2miller) | Ohio Bandits | 2.1 |
| 8. | Valverde, Jose | (plpl512) | Saint-Louis Cards | 2.1 |
| 9. | Edwards, Carl | Pittsburgh Pirates | 2.1 | |
| 10. | Allen, Cody | (TerryMrCub) | Last Year's Legends | 2.1 |
| 11. | Soria, Joakim | (bcarnes) | B3 Reds | 2.1 |
| 12. | Jansen, Kenley | (Axlrose) | Las Vegas Lightning | 2.2 |
| 13. | Jansen, Kenley | (roguerouge) | New York Umbrella Corp | 2.2 |
| 14. | Britton, Zach | (skieff) | Hustons Mill YardHawks | 2.2 |
| 15. | Burns, Todd | (Mranastasia) | Cox Tuggers | 2.2 |
| 16. | Dibble, Rob | (RoyHobbs) | Burlington Bees | 2.3 |
| 17. | Betances, Dellin | (yoshuap) | Galena Bulldawgs | 2.3 |
| 18. | Thornburg, Tyler | (link182) | Portland Penguins | 2.3 |
| 19. | Jansen, Kenley | (roguerouge) | Gary-Southshore Railcats | 2.3 |
| 20. | Kimbrel, Craig | (statman2425) | Bow Tie Village Ball Talk | 2.3 |
| 21. | Miller, Andrew | (ColinBoucher) | Alpha Bet City 🔤's | 2.3 |
| 22. | Miller, Andrew | (tsiegler) | Tampa Arsenal | 2.3 |
| 23. | Marmol, Carlos | (plpl512) | Portland Beavers | 2.3 |
| 24. | Betances, Dellin | (maharacer) | Hopland Hoppers | 2.4 |
| 25. | Davis, Wade | (Trulaia) | Scranton Ducks | 2.3 |
| 26. | Buchter, Ryan | (boomba) | Albuquerque Blue Crystals | 2.3 |
| 27. | Balfour, Grant | Bompton Bombers | 2.4 | |
| 28. | Jansen, Kenley | (zigwiggity) | Scobey Sharks | 2.4 |
| 29. | Barraclough, Kyle | (doittoitlars) | Boucherville Rooks | 2.4 |
| 30. | Allen, Cody | (BigRedMachine90) | Huntington Vipers | 2.4 |
| 31. | Kimbrel, Craig | (Mortamar1966) | Humbleberg Hash Slingers | 2.4 |
| 32. | Oh, Seung-hwan | (Ctsteelers) | Teen Spirit | 2.5 |
| 33. | Chapman, Aroldis | (rfb60609) | Avondale Vegetarians | 2.4 |
| 34. | Devenski, Chris | (yoshuap) | Icelandic Molten Thongs | 2.5 |
| 35. | Radatz, Dick | Las Vegas Alcoholics | 2.4 | |
| 36. | Jansen, Kenley | (yoshuap) | Jersey City Jaguars | 2.4 |
| 37. | Thornburg, Tyler | (boomba) | Albuquerque Blue Crystals | 2.5 |
| 38. | Kim, Byung-Hyun | (Krallel) | Arizona Diamondbacks | 2.4 |
| 39. | Ryan, B.J. | (grantmoyer) | London Lions | 2.5 |
| 40. | Chapman, Aroldis | (yudi4400) | Buffalo Bees | 2.5 |
| 41. | Chapman, Aroldis | (errorleader2) | Wakanda Black Panthers | 2.5 |
| 42. | Strop, Pedro | (tribetime89) | Niceville Fireballers | 2.5 |
| 43. | Rodriguez, Francisco | HUNTINGTON KINGS | 2.5 | |
| 44. | Britton, Zach | (QWERTYUIOP) | Alamosa Anemones 1-170⚾ | 2.5 |
| 45. | Edwards, Carl | (BigRedMachine90) | Huntington Vipers | 2.5 |
| 46. | Smith, Will | (djeter2) | New York Yankees | 2.5 |
| 47. | Marmol, Carlos | (CrashDavis8) | Chicago White Sox | 2.5 |
| 48. | Gagne, Eric | Blue Grass Bombers | 2.5 | |
| 49. | Kimbrel, Craig | (jaredhamann) | Las Vegas ASHBA's | 2.5 |
| 50. | Barraclough, Kyle | (jrf1717) | Detroit Psychos | 2.5 |