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 | (filler) | Boulder Cavemen | 37 |
| 2. | Rogers, Steve | (wduncan) | Miami Cats | 30 |
| 3. | Gomez, Lefty | (sheikyerboudi) | WKRP Flytraps | 29 |
| 4. | Johnson, Walter | (Tlambiase) | Frederick Blue Claws | 29 |
| 5. | Ford, Russ | (RoastPork) | Georgetown Pirates | 28 |
| 6. | Richard, J.R. | (dynasty) | Nevada Snakes | 28 |
| 7. | Arrieta, Jake | Minnesota Frogs | 28 | |
| 8. | Mathewson, Christy | (Mortamar1966) | Heather Town Worm Riders | 28 |
| 9. | Martinez, Pedro | (filler) | New Jersey Devils | 28 |
| 10. | Palmer, Jim | (walle-1) | Carolina Bulldogs | 28 |
| 11. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 12. | Fujimoto, Hideo | (filler) | San Diego Sharks | 28 |
| 13. | Fujimoto, Hideo | (filler) | Boulder Cavemen | 28 |
| 14. | Johnson, Walter | (sheikyerboudi) | 12th Man Leftovers | 28 |
| 15. | Johnson, Walter | (RedsHawk) | RED PHANTOMS | 28 |
| 16. | Maddux, Greg | (filler) | Kentucky Horses | 28 |
| 17. | Schmidt, Jason | (teamkev24) | Lemonade Stand Ducks | 27 |
| 18. | Vance, Dazzy | (gibblets1973) | Long Beach NL Lawmen | 27 |
| 19. | Johnson, Randy | (jas202) | Smallville Crows | 27 |
| 20. | Koufax, Sandy | (filler8) | Iowa Pigs | 27 |
| 21. | Maddux, Greg | Miami Serpents | 27 | |
| 22. | Sutton, Don | (gibblets1973) | Badger Bulldogs | 27 |
| 23. | Nomo, Hideo | (duli) | Kansai Locomotives | 27 |
| 24. | Rogers, Steve | (gibblets1973) | Dunnville Diablos | 27 |
| 25. | Nola, Aaron | (Schvitz) | Milwaukee Thiefs | 27 |
| 26. | deGrom, Jacob | (bdavids28) | Greasy Jungle | 27 |
| 27. | Higuera, Teddy | (Maulucci16) | Base Robbers | 27 |
| 28. | Maddux, Greg | (54pete54) | Thorold Trojans | 27 |
| 29. | Scott, Mike | (brawlers) | Texas Brawlers | 27 |
| 30. | Stratton, Monty | (charlesgant68) | Muratti Peers | 27 |
| 31. | Arrieta, Jake | (Artinshki) | Base Ball Classics | 27 |
| 32. | Rogers, Steve | (kingstreet) | Singapore Slingers | 27 |
| 33. | Carlton, Steve | (filler) | Dallas Mustangs | 27 |
| 34. | Hernandez, Felix | (filler) | Chicago Reapers | 27 |
| 35. | Martinez, Pedro | (charlesgant68) | Roanoke Rhinos | 27 |
| 36. | Carlton, Steve | (Theo_smith) | East Nashville Vinyl | 27 |
| 37. | McNally, Dave | (walle-1) | Utah Nightmares | 27 |
| 38. | deGrom, Jacob | (chaaad) | Cuban X-Giants | 27 |
| 39. | deGrom, Jacob | (filler8) | Atlanta Gorillas | 27 |
| 40. | Alexander, Pete | (Tbone34) | Barker Bait | 26 |
| 41. | Mathewson, Christy | (chaaad) | Bayside Little League | 26 |
| 42. | Martinez, Pedro | (Artinshki) | Minnesota Charlie Browns | 26 |
| 43. | Leonard, Dutch | (buccofever1976) | Angry Demon Dogs | 26 |
| 44. | Ryan, Nolan | (bdavids28) | Escape From The Bronx | 26 |
| 45. | Ford, Russ | (sheikyerboudi) | St. Louis Perfectos | 26 |
| 46. | Sutton, Don | (Theo_smith) | Ithaca Rhinos | 26 |
| 47. | Clemens, Roger | (DaveH) | Ladson Dodgers | 26 |
| 48. | deGrom, Jacob | (Chodas) | North Central Ninjas | 26 |
| 49. | Richard, J.R. | (wadesayles) | McDowell Miners | 26 |
| 50. | Righetti, Dave | (injuns) | Long Island Injuns | 26 |
