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 | (ILO-STL) | STL Silencers '23 | 37 |
| 2. | Gomez, Lefty | (sheikyerboudi) | WKRP Flytraps | 29 |
| 3. | Johnson, Walter | (Saints69) | Have You Ever Seen THE RAIN 2 | 29 |
| 4. | Martinez, Pedro | (ressien) | LA Top Guns | 28 |
| 5. | Fujimoto, Hideo | Shochiku Robins | 28 | |
| 6. | Arrieta, Jake | (filler) | BB BullDogs | 28 |
| 7. | Maddux, Greg | (rreebe916) | SCOTT COUNTY STINGERS | 28 |
| 8. | Johnson, Walter | (filler) | Sarasota HENCHMEN | 28 |
| 9. | Hernandez, Roberto | (CoachMad) | Nashville Stars | 28 |
| 10. | Palmer, Jim | (filler) | Tampa Bay Diamond Dogs | 28 |
| 11. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 12. | Fujimoto, Hideo | (skooler1) | Kyoto Sluggers | 28 |
| 13. | Mathewson, Christy | (Mortamar1966) | Heather Town Worm Riders | 28 |
| 14. | Richard, J.R. | (rreebe916) | Dixie Boy Happy Toyz | 28 |
| 15. | McNally, Dave | (Siverson) | Kaslo Whiskey Jacks | 27 |
| 16. | deGrom, Jacob | (chaaad) | Cuban X-Giants | 27 |
| 17. | deGrom, Jacob | (bigror25) | Brooklyn Gunners | 27 |
| 18. | Maddux, Greg | (richgibson) | Kronstadt SAILORS | 27 |
| 19. | Koufax, Sandy | (Tjm) | Ravenwood Dukes | 27 |
| 20. | Higuera, Teddy | (Maulucci16) | Base Robbers | 27 |
| 21. | Hernandez, Felix | (shelley71) | Buzzing unchers | 27 |
| 22. | Vance, Dazzy | (gibblets1973) | Long Beach NL Lawmen | 27 |
| 23. | Johnson, Randy | (govols1975) | New London Sharks | 27 |
| 24. | Stratton, Monty | (charlesgant68) | Muratti Peers | 27 |
| 25. | Sutton, Don | (gibblets1973) | Badger Bulldogs | 27 |
| 26. | Maddux, Greg | (Bishop48) | Ft. Worth Cats | 27 |
| 27. | Nomo, Hideo | (dgeorgi) | PINEAPPLE EXPRESS | 27 |
| 28. | Carlton, Steve | (filler) | Gotham Black Knights | 27 |
| 29. | Rogers, Steve | (kingstreet) | Singapore Slingers | 27 |
| 30. | Scott, Mike | (brawlers) | Texas Brawlers | 27 |
| 31. | Schmidt, Jason | (teamkev24) | Lemonade Stand Ducks | 27 |
| 32. | Rogers, Steve | (gibblets1973) | El Paso Diablos | 27 |
| 33. | Martinez, Pedro | (charlesgant68) | Roanoke Longs | 27 |
| 34. | Carlton, Steve | (Theo_smith) | East Nashville Vinyl | 27 |
| 35. | Richard, J.R. | (filler8) | Sarasota Sharks | 26 |
| 36. | Walsh, Ed | (maxfischer) | Dallas Toro’s | 26 |
| 37. | deGrom, Jacob | (mgm7) | Detroit Dumpsters 2 | 26 |
| 38. | Cone, David | (Griff) | Washington SENATORS | 26 |
| 39. | Johnson, Walter | (chaaad) | Brooklyn Enterprise | 26 |
| 40. | Kershaw, Clayton | (phxfire) | Blue Bees | 26 |
| 41. | Gomez, Lefty | (dynasty) | Jersey Beasts | 26 |
| 42. | Nola, Aaron | (dgeorgi) | STEPPIN WOLF MAGIC CARPET RIDE | 26 |
| 43. | deGrom, Jacob | (Charles_graf) | New York Mets | 26 |
| 44. | Walsh, Ed | (rreebe916) | OBX Americans-3 | 26 |
| 45. | Halladay, Roy | (Slippingjimmy) | Copenhagen Danes | 26 |
| 46. | Maddux, Greg | (filler) | Centennial Terriers | 26 |
| 47. | Feller, Bob | (teamkev24) | San Francisco Seals | 26 |
| 48. | Martinez, Pedro | (Zigwiggity) | Seoul Slut Makers | 26 |
| 49. | Ryan, Nolan | Uniontown Brown | 26 | |
| 50. | Starffin, Victor | (gibblets1973) | Bally Haly Bay Stars | 26 |
