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. | Petit, Yusmeiro | (habsco) | Laurel Billings Bees | 40 |
| 2. | Richards, Trevor | (zelda10) | Shreveport Sharks | 38 |
| 3. | Martin, Chris | (coachmcs) | Philadelphia Phillies | 37 |
| 4. | Gallegos, Giovanny | (habsco) | Laurel Billings Bees | 37 |
| 5. | Garcia, Yimi | (Mick) | Chicago Pale hose | 36 |
| 6. | Hader, Josh | (itchy008) | Albuquerque Blue Crystals | 35 |
| 7. | Poche, Colin | (LDJS1947) | MISSOURI TIGERS | 33 |
| 8. | Pressly, Ryan | (habsco) | St Catharines Blues | 30 |
| 9. | Iglesias, Raisel | (filler) | Jacksonville Thunder | 29 |
| 10. | Pfiester, Jack | (Shpennymons) | New York Highlanders | 28 |
| 11. | Boddicker, Mike | (befulton) | NC Black Dogs | 28 |
| 12. | Martinez, Pedro | (rainman) | Stygian Witches | 28 |
| 13. | Walsh, Ed | (jamin) | Chester Springs Menjai | 28 |
| 14. | Palmer, Jim | (BaltimoreChop) | Bmore Blue Crabs | 28 |
| 15. | Anderson, Nick | (rowdy1982) | Walla Walla Warthogs | 28 |
| 16. | Clippard, Tyler | (redsfan1234) | Nantucket Coasters | 28 |
| 17. | Anderson, Nick | Dunder Mifflin Paper Company | 28 | |
| 18. | Tiant, Luis | (nycubsfan) | Jackson Heights Knights | 28 |
| 19. | Sutton, Don | (Theo19) | Worthington Caiman | 28 |
| 20. | Koufax, Sandy | (Silas) | Naples Trojans | 28 |
| 21. | Martinez, Pedro | (56Castle99) | Chenango Wolves | 28 |
| 22. | Hernandez, Felix | (shelley71) | Nashville Sounds | 27 |
| 23. | Schilling, Curt | (JohnHeidy) | Hackensack Hawkeyes | 27 |
| 24. | Fernandez, Sid | (ClassicOs) | Baltimore Orioles | 27 |
| 25. | Walsh, Ed | (dynasty) | Singapore Blue Jays | 27 |
| 26. | Verlander, Justin | (jamin) | Chester Springs Menjai | 27 |
| 27. | Kluber, Corey | (Sidneypointers) | Broadlands Hawks | 27 |
| 28. | Tiant, Luis | (filler8) | Iowa Pigs | 27 |
| 29. | Santana, Johan | (ClassicOs) | Baltimore Orioles | 27 |
| 30. | Turner, Jim | (aaabob) | Windsor White's Other I's | 27 |
| 31. | Tiant, Luis | (jeter0296) | Freehold Yankees2 | 27 |
| 32. | Martinez, Pedro | (filler) | Providence Grays | 27 |
| 33. | Koufax, Sandy | (stevenray) | Brooklyn Bulls | 27 |
| 34. | Hader, Josh | (ColinBoucher) | Sycamore Street B.I.G’s | 27 |
| 35. | Greinke, Zack | (ThEiRoNhOrSe04) | Hoboken Zephyrs | 27 |
| 36. | Tudor, John | (Potholes) | Kenora Thistles | 27 |
| 37. | Arrieta, Jake | (Relvinmelvin) | Santa Fe Soldiers | 27 |
| 38. | Martinez, Pedro | (HaloFire) | Staten Island Fire | 27 |
| 39. | Hunter, Catfish | (kingstreet) | Singapore Slingers | 27 |
| 40. | Scott, Mike | (shane211) | South Dakota Bears | 27 |
| 41. | Peralta, Freddy | (geisenaj) | Hill Valley Lightning | 27 |
| 42. | Joss, Addie | (Shpennymons) | Chesapeake Oysters | 27 |
| 43. | Ford, Russ | (broles) | Philly Elephants | 27 |
| 44. | Young, Cy | (bravesman) | Shreveport Spiders | 27 |
| 45. | Kershaw, Clayton | (dgeorgi) | WALLA WALLA WEASEL WACKERS | 27 |
| 46. | Stephenson, Robert | (joemcg) | Desert Diablos | 27 |
| 47. | DeLeon, Jose | (Macho_Row) | Central PA Leppards | 26 |
| 48. | Marichal, Juan | (Iamcota) | Londonderry LIzard Kings | 26 |
| 49. | Sale, Chris | (marty17595) | Healdsburg Hawks | 26 |
| 50. | Verlander, Justin | (Diddly) | Ladson Cougars | 26 |