Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Wins)
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. | Kimbrel, Craig | (Alexmcm) | Copenhagen Copperheads | 37 |
| 2. | Johnson, Walter | Brock Bullies | 28 | |
| 3. | Fujimoto, Hideo | (DaveH) | Shochiku Robins | 28 |
| 4. | Palmer, Jim | Tampa Bay Diamond Dogs | 28 | |
| 5. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 6. | Fujimoto, Hideo | (Ichiro51) | Honda Ruckus | 28 |
| 7. | Hernandez, Roberto | (CoachMad) | Nashville Stars | 28 |
| 8. | Stratton, Monty | (charlesgant68) | Muratti Young Ladies | 27 |
| 9. | Rogers, Steve | (gibblets1973) | El Paso Diablos | 27 |
| 10. | Koufax, Sandy | (Tjm) | Ravenwood Dukes | 27 |
| 11. | Higuera, Teddy | (maulucci16) | Base Robbers | 27 |
| 12. | Schmidt, Jason | (teamkev24) | Lemonade Stand Ducks | 27 |
| 13. | Nomo, Hideo | (dgeorgi) | PINEAPPLE EXPRESS | 27 |
| 14. | Vance, Dazzy | (gibblets1973) | Long Beach NL Lawmen | 27 |
| 15. | Johnson, Randy | (Mrploppie) | New London Sharks | 27 |
| 16. | Sutton, Don | (gibblets1973) | Badger Bulldogs | 27 |
| 17. | Rogers, Steve | (kingstreet) | Singapore Slingers | 27 |
| 18. | Carlton, Steve | (filler) | Gotham Black Knights | 27 |
| 19. | deGrom, Jacob | (bigror25) | Brooklyn Gunners | 27 |
| 20. | Carlton, Steve | (Theo_smith) | East Nashville Vinyl | 27 |
| 21. | Hernandez, Felix | (Gaberino) | Buzzing Brawlers | 27 |
| 22. | Clemens, Roger | (DaveH) | Ladson Dodgers | 26 |
| 23. | Fernandez, Sid | (Mortamar1966) | Kansas City Monarchs | 26 |
| 24. | Walsh, Ed | (dynasty8) | Dallas Cowboys | 26 |
| 25. | deGrom, Jacob | (aimcell) | Detroit Dumpsters 2 | 26 |
| 26. | Maddux, Greg | (Artinshki) | Base Ball Classics | 26 |
| 27. | Maddux, Greg | (rreebe916) | Dixie Boy Happy Toyz | 26 |
| 28. | Maddux, Greg | (babyave1) | Boston BigHats | 26 |
| 29. | Walsh, Ed | (rawlscl78) | Huntsville Bandits | 26 |
| 30. | Richard, J.R. | (DaveH) | Ladson Dodgers | 26 |
| 31. | Walsh, Ed | (filler8) | OBX Americans-3 | 26 |
| 32. | Martinez, Pedro | (Wileydog97) | Raleigh Bulldogs | 26 |
| 33. | Richard, J.R. | (athlete4) | Uniontown Brown | 26 |
| 34. | Ryan, Nolan | (bdavids28) | Escape From The Bronx | 26 |
| 35. | Johnson, Walter | (rreebe916) | RED Aspes | 26 |
| 36. | Maddux, Greg | (ThEiRoNhOrSe04) | Centennial Terriers | 26 |
| 37. | Mathewson, Christy | (chaaad) | BX Bombers | 26 |
| 38. | Alexander, Pete | (Tbone34) | Barker Bait | 26 |
| 39. | Cone, David | (filler) | Washington SENATORS | 26 |
| 40. | Johnson, Walter | (chaaad) | Brooklyn Enterprise | 26 |
| 41. | deGrom, Jacob | (ThEiRoNhOrSe04) | North Central Ninjas | 26 |
| 42. | Righetti, Dave | (injuns) | Long Island Injuns | 26 |
| 43. | Johnson, Randy | (Trulaia) | Revenge of Samson | 26 |
| 44. | Richard, J.R. | (bjack) | New London Sharks | 26 |
| 45. | Blanton, Cy | (Evilpuppy56) | Gasugbuno Gorillas | 26 |
| 46. | deGrom, Jacob | (ColinBoucher) | Lynchburg Lemon Squeezers | 26 |
| 47. | Ryan, Nolan | (markphip) | Springfield Isotopes | 26 |
| 48. | Arrieta, Jake | (chaaad) | New York Knickerbockers | 26 |
| 49. | Maddux, Greg | (chaaad) | New York Knickerbockers | 26 |
| 50. | deGrom, Jacob | (morangslick) | Annville Anteaters | 26 |
