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. | Hernandez, Roberto | (CoachMad) | Nashville Stars | 28 |
| 3. | Fujimoto, Hideo | (DaveH) | Shochiku Robins | 28 |
| 4. | Palmer, Jim | (Griff) | Tampa Bay Diamond Dogs | 28 |
| 5. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 6. | Fujimoto, Hideo | (GlansGruber) | Honda Ruckus | 28 |
| 7. | Rogers, Steve | (kingstreet) | Singapore Slingers | 27 |
| 8. | Nomo, Hideo | (dgeorgi) | PINEAPPLE EXPRESS | 27 |
| 9. | deGrom, Jacob | (dynasty) | Parma FrOGGIES | 27 |
| 10. | Carlton, Steve | (rudyt3939) | Gotham Black Knights | 27 |
| 11. | Vance, Dazzy | (gibblets1973) | Long Beach NL Lawmen | 27 |
| 12. | Johnson, Randy | (Mrploppie) | New London Sharks | 27 |
| 13. | Hernandez, Felix | (kevin0gonzales) | Buzzing Brawlers | 27 |
| 14. | Rogers, Steve | (gibblets1973) | El Paso Diablos | 27 |
| 15. | Koufax, Sandy | (Tjm) | Ravenwood Dukes | 27 |
| 16. | Richard, J.R. | (bjack) | New London Sharks | 26 |
| 17. | McKenzie, Triston | (hanson) | Nashville Sounds | 26 |
| 18. | Ryan, Nolan | (REVEJB) | Sowa Sotos | 26 |
| 19. | Starffin, Victor | (gibblets1973) | Bally Haly Bay Stars | 26 |
| 20. | deGrom, Jacob | (Tjm) | Prison Break | 26 |
| 21. | Martinez, Pedro | (Zigwiggity) | Seoul Rolling Quartz | 26 |
| 22. | Inao, Kazuhisa | Kwai Chang Caneiacs | 26 | |
| 23. | Feller, Bob | (teamkev24) | San Francisco Seals | 26 |
| 24. | Maddux, Greg | (babyave1) | Boston BigHats | 26 |
| 25. | Walsh, Ed | (rreebe916) | Huntsville Bandits | 26 |
| 26. | Sutton, Don | (Theo_smith) | Ithaca Rhinos | 26 |
| 27. | Johnson, Randy | (Trulaia) | Revenge of Samson | 26 |
| 28. | Ryan, Nolan | (bdavids28) | Escape From The Bronx | 26 |
| 29. | Gibson, Bob | (plpl512) | Edmonton Cracker Cats | 26 |
| 30. | Walsh, Ed | (timnara1) | OBX Americans-3 | 26 |
| 31. | Clemens, Roger | (DaveH) | Ladson Dodgers | 26 |
| 32. | Kershaw, Clayton | (BAR23) | Boston Bees | 26 |
| 33. | Gomez, Lefty | (richp) | Jersey Beasts | 26 |
| 34. | Cone, David | (dynasty8) | Washington SENATORS | 26 |
| 35. | Johnson, Walter | (chaaad) | Brooklyn Enterprise | 26 |
| 36. | Gibson, Bob | (bostontex24) | Boston Pilgrims | 26 |
| 37. | deGrom, Jacob | (ColinBoucher) | Lynchburg Lemon Squeezers | 26 |
| 38. | Ryan, Nolan | (MikeDrop0221) | Cognitive Crushers | 26 |
| 39. | Arrieta, Jake | (chaaad) | New York Knickerbockers | 26 |
| 40. | Maddux, Greg | (chaaad) | New York Knickerbockers | 26 |
| 41. | deGrom, Jacob | (Crackpot) | Annville Anteaters | 26 |
| 42. | Palmer, Jim | (aaabob) | Windsor White's Other I's | 26 |
| 43. | deGrom, Jacob | (rreebe916) | Huntsville Bandits | 26 |
| 44. | Turner, Jim | Windsor White's Other I's | 26 | |
| 45. | Youmans, Floyd | (pretzelshop) | Kansas City Monarchs | 26 |
| 46. | deGrom, Jacob | (ThEiRoNhOrSe04) | North Central Ninjas | 26 |
| 47. | Alexander, Pete | (Tbone34) | Barker Bait | 26 |
| 48. | Walsh, Ed | (TMNT740) | Dallas Cowboys | 26 |
| 49. | deGrom, Jacob | (bph1978) | Detroit Dumpsters 2 | 26 |
| 50. | Richard, J.R. | (DaveH) | Ladson Dodgers | 26 |
