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 | (filler8) | Pittsburgh Plunder | 37 |
| 2. | Rogers, Steve | (wduncan) | Miami Cats | 30 |
| 3. | Johnson, Walter | (tlambiase) | Frederick Blue Claws | 29 |
| 4. | Gomez, Lefty | (filler8) | Chicago Reapers | 29 |
| 5. | Martinez, Pedro | (brian4656) | Florida Crabs | 28 |
| 6. | Maddux, Greg | (RichGibson) | Detorit PURPLE GANG | 28 |
| 7. | Johnson, Walter | (walle-1) | Sacramento Lions | 28 |
| 8. | Richard, J.R. | (jas202) | San Diego Gwynns | 28 |
| 9. | Palmer, Jim | (dynasty) | Arizona Suns | 28 |
| 10. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 11. | Fujimoto, Hideo | (Ragingkroner) | Yonaguni Sharks | 28 |
| 12. | Johnson, Walter | (filler) | Carolina Bulldogs | 28 |
| 13. | Arrieta, Jake | (dynasty) | Boulder Cavemen | 28 |
| 14. | Mathewson, Christy | (Mortamar1966) | Heather Town Worm Riders | 28 |
| 15. | Fujimoto, Hideo | Kansas Grasshoppers | 28 | |
| 16. | Ford, Russ | (finalbody) | Kansas Grasshoppers | 28 |
| 17. | Stratton, Monty | (charlesgant68) | Muratti Peers | 27 |
| 18. | Nola, Aaron | (Schvitz) | Milwaukee Thiefs | 27 |
| 19. | Hernandez, Felix | (revejb) | Tao Braos | 27 |
| 20. | Maddux, Greg | (filler) | Iowa Pigs | 27 |
| 21. | deGrom, Jacob | (bdavids28) | Greasy Jungle | 27 |
| 22. | Scott, Mike | (brawlers) | Texas Brawlers | 27 |
| 23. | Brown, Mordecai | (chaaad) | Bayside Little League | 27 |
| 24. | Higuera, Teddy | (maulucci16) | Base Robbers | 27 |
| 25. | Maddux, Greg | (Kaline65) | Kentucky Horses | 27 |
| 26. | Martinez, Pedro | (charlesgant68) | Roanoke Rhinos | 27 |
| 27. | Schmidt, Jason | (teamkev24) | Lemonade Stand Ducks | 27 |
| 28. | Carlton, Steve | (filler) | Toronto Tigers | 27 |
| 29. | Rogers, Steve | (gibblets1973) | Dunnville Diablos | 27 |
| 30. | Vance, Dazzy | (gibblets1973) | Long Beach NL Lawmen | 27 |
| 31. | Johnson, Randy | (dynasty8) | Atlanta Gorillas | 27 |
| 32. | Sutton, Don | (gibblets1973) | Badger Bulldogs | 27 |
| 33. | Nomo, Hideo | (RyanPak) | Kansai Locomotives | 27 |
| 34. | McNally, Dave | (walle-1) | Kansas Grasshoppers | 27 |
| 35. | deGrom, Jacob | (chaaad) | Cuban X-Giants | 27 |
| 36. | Koufax, Sandy | (filler) | Dallas Mustangs | 27 |
| 37. | Arrieta, Jake | (Artinshki) | Base Ball Classics | 27 |
| 38. | Rogers, Steve | (kingstreet) | Singapore Slingers | 27 |
| 39. | deGrom, Jacob | (filler) | Charlotte Spiders | 27 |
| 40. | Carlton, Steve | (Theo_smith) | East Nashville Vinyl | 27 |
| 41. | Leonard, Dutch | (richgibson) | LIVING MUMMIES | 26 |
| 42. | Alexander, Pete | (Tbone34) | Barker Bait | 26 |
| 43. | Martinez, Pedro | (Barr512) | Memphis Yeti | 26 |
| 44. | Martinez, Pedro | (jmoffitt68519) | Alberta Astronauts | 26 |
| 45. | Snell, Blake | (kevinrice) | Dixie Boy Happy Toyz | 26 |
| 46. | Duchscherer, Justin | (WorcWarr) | Worcester Warriors | 26 |
| 47. | Grove, Lefty | (DaveH) | Brooklyn Dodgers | 26 |
| 48. | Mathewson, Christy | (chaaad) | Bayside Little League | 26 |
| 49. | Gibson, Bob | (bostontex24) | Boston Pilgrims | 26 |
| 50. | McLain, Denny | (829er) | Gladsville Proles | 26 |
