Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (ERA)
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. | Adams, Mike | (RichieBlondet) | West Side Whizzers | 0.27 |
| 2. | Jansen, Kenley | (morangslick) | Chicago Reapers | 0.28 |
| 3. | Benitez, Armando | (Noleary) | Baltimore Monumentals | 0.52 |
| 4. | Schiraldi, Calvin | (Malone824) | Bluff City Eagles | 0.57 |
| 5. | Jackson, Mike | (nmiller4) | Cincinnati Reds | 0.57 |
| 6. | Nathan, Joe | (Mortamar1966) | Morleyville Mud Skippers | 0.58 |
| 7. | Eichhorn, Mark | (chaaad) | Newark Eagles | 0.59 |
| 8. | Rivera, Mariano | (chunkyschumps) | Raging Roiders | 0.60 |
| 9. | Uehara, Koji | (ranger) | DEER PARK DEER | 0.63 |
| 10. | Adams, Mike | (nycubsfan) | Jackson Heights Knights | 0.63 |
| 11. | McGraw, Tug | (rowdy1982) | Seven of Nine | 0.64 |
| 12. | Jansen, Kenley | (metfan1) | Bartonsville Pumas | 0.65 |
| 13. | Chapman, Aroldis | (Artinshki) | Base Ball Classics | 0.65 |
| 14. | Abernathy, Ted | (joeboodah) | New Brunswick Zebras | 0.68 |
| 15. | Street, Huston | (Artinshki) | Base Ball Classics | 0.68 |
| 16. | Papelbon, Jonathan | (ThEiRoNhOrSe04) | Liberty Banditos 57 | 0.68 |
| 17. | Davis, Wade | (Malone824) | Alton Cavemen | 0.69 |
| 18. | Kelley, Shawn | (Evilpuppy56) | Beastie Boys | 0.70 |
| 19. | Adams, Mike | (dynasty) | Forest City Owls | 0.71 |
| 20. | Alvarado, Jose | (dynasty8) | Boston Bees | 0.71 |
| 21. | Chapman, Aroldis | (Artinshki) | Base Ball Classics | 0.72 |
| 22. | Howe, Steve | (Bsinco) | H Town H's | 0.72 |
| 23. | Eckersley, Dennis | (jrobandsteal) | Boston Bees | 0.72 |
| 24. | Feliz, Neftali | (ranger) | J'VILLE JETS | 0.73 |
| 25. | Wilhelm, Hoyt | (liddlefeat) | Raritan Retrievers | 0.73 |
| 26. | Eckersley, Dennis | (Trulaia) | Vermont Lake Monsters | 0.73 |
| 27. | Uehara, Koji | (dunroche) | Tuvalu Copras | 0.74 |
| 28. | Broxton, Jonathan | (Roots) | Brooklyn Dodgers | 0.75 |
| 29. | Hall, Dick | (babyave1) | Loudoun Lassos | 0.75 |
| 30. | Benitez, Armando | (757Moose) | Back in the day Brawlers | 0.75 |
| 31. | Iglesias, Raisel | (coachmcs) | Death Valley Devils | 0.76 |
| 32. | Montgomery, Jeff | (johnmardis) | Warner Town Animaniacs | 0.78 |
| 33. | Harris, Will | (jeter0296) | Staten Island Yankees | 0.77 |
| 34. | Papelbon, Jonathan | (RichieBlondet) | Brooklyn Boppers | 0.78 |
| 35. | Adams, Mike | (infmusxp) | Roided Up Crazies | 0.78 |
| 36. | Gagne, Eric | (Mrploppie) | Danville Duds | 0.81 |
| 37. | Holland, Greg | (michelb3514) | Iowa Corn Pickers | 0.81 |
| 38. | Eichhorn, Mark | (johnmardis) | Warner Town Animaniacs | 0.81 |
| 39. | Fromme, Art | (filler) | Wild Cats | 0.82 |
| 40. | Capps, Carter | (chaaad) | Bartons Nighthawks | 0.81 |
| 41. | Uehara, Koji | (Talon92tsi) | Really Mean Hamsters | 0.81 |
| 42. | Zimmerman, Jeff | (filler) | WF Greyhounds | 0.82 |
| 43. | Melancon, Mark | (Trulaia) | Chapecó Panther | 0.82 |
| 44. | Foulke, Keith | (sgt714) | Boston Red Sox | 0.83 |
| 45. | Valverde, Jose | (heheman69) | Baltimore Orioles | 0.83 |
| 46. | Giles, Ken | (LDJS1947) | MISSOURI MONARCHS | 0.83 |
| 47. | Gallegos, Giovanny | (hanson) | Arizona Aces | 0.83 |
| 48. | Kimbrel, Craig | (nycubsfan) | Klein Bearkats | 0.84 |
| 49. | Benitez, Armando | (filler) | 62 Archers of Love | 0.84 |
| 50. | McCool, Billy | (peteym17) | Potomac Pirates | 0.84 |
