Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
1. Uehara, Koji Washington Senators 0.51
2. Jansen, Kenley Manchester Marauders 0.52
3. Doolittle, Sean Siddonsburg Superdupers 0.53
4. Chapman, Aroldis Washington Racin' Rebels 0.54
5. Saito, Takashi Las Vegas Pit Bosses 0.55
6. Marmol, Carlos Springfield Troy McClures 0.57
7. Chapman, Aroldis Htown Skeeters 0.57
8. Wagner, Billy Iowa Corn Pickers 0.57
9. Adams, Mike Chicago Outfit 0.57
10. Rivera, Mariano Las Vegas Scorpions 0.58
11. Robertson, David Charleston Muff Destroyers 0.58
12. Soriano, Rafael Las Vegas Lucky 7's 0.58
13. Uehara, Koji Rochester RHINO 0.59
14. Kimbrel, Craig South Dakota Cyclones 0.60
15. Jackson, Mike Burma Harry Butz 0.60
16. Feliz, Neftali Las Vegas Silver Knights 0.60
17. Gagne, Eric Silver Jet 0.60
18. Adams, Mike The Meadows CaballerosDeOro 0.60
19. Kimbrel, Craig Clearwater Crocs 0.60
20. Adams, Mike Iowa Corn Pickers 0.61
21. Kimbrel, Craig Las Vegas Flying Elvi 0.61
22. Rivera, Mariano Oakmont Hopefuls 0.61
23. Groom, Buddy Historic Grays 0.61
24. Doolittle, Sean Jackson Jays 0.61
25. Smoltz, John Honolulu Sharks 0.61
26. Henke, Tom Torbay Tides 0.61
27. Adams, Mike Forest City Owls 0.61
28. Adams, Mike Boston Commons 0.62
29. Wagner, Billy Tottenville Pirates 0.62
30. Gagne, Eric Boston Muff Pounders 0.62
31. Kimbrel, Craig Macon Apes 0.62
32. Hader, Josh Sun City Islanders 0.62
33. Gagne, Eric Dot Com 0.62
34. Feliz, Neftali Lake Havasu Rain-11 0.62
35. Graveman, Kendall Brown Ball Bigwelds 0.62
36. McGraw, Tug Team Seven 0.63
37. Adams, Mike Mount Pearl Marauders 0.63
38. Balfour, Grant Chittenango Bears 0.63
39. Eckersley, Dennis Dixie Boy Happy Toyz 0.63
40. Doolittle, Sean West Park Panthers 0.63
41. Giles, Ken Minot Minotaurs 0.63
42. Uehara, Koji Homestead Smokestacks 0.63
43. Sewald, Paul Laredo Lemurs 0.63
44. Street, Huston Wandering Wolverines 0.63
45. Doolittle, Sean NY Rangers 0.63
46. Jackson, Mike Manchester Marauders 0.63
47. Adams, Mike JACKSON HEIGHTS SHARKS 0.63
48. Wilhelm, Hoyt Raritan Retrievers 0.63
49. Chapman, Aroldis New York Bluebirds 0.64
50. Doolittle, Sean Chenango Wolves 0.64