Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (H/9)
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. | Robertson, David | Rockin' Robins | 1.4 | |
| 2. | Feliz, Neftali | (sgt714) | Boston Americans III | 1.5 |
| 3. | Hand, Brad | Bakersfield Guardians | 1.9 | |
| 4. | Jansen, Kenley | (sgt714) | Boston Americans V | 1.9 |
| 5. | Bottalico, Ricky | (jim2miller) | Ohio Bandits | 2.1 |
| 6. | Valverde, Jose | (Buttermaker) | Saint-Louis C.K's | 2.1 |
| 7. | Allen, Cody | (htennis) | John Gibson For the Vezina | 2.1 |
| 8. | McHugh, Collin | (Barefootstomp) | Appalachian Moonshiners | 2.2 |
| 9. | Jansen, Kenley | (SilverFox) | Lakeland Flying Tigers | 2.2 |
| 10. | Britton, Zach | (skieff) | Hustons Mill YardHawks | 2.2 |
| 11. | Burns, Todd | (Mranastasia) | Cox Tuggers | 2.2 |
| 12. | Dibble, Rob | (dbutts) | Burlington Bees | 2.3 |
| 13. | Edwards, Carl | (JoElectric) | Denver Demon Donkeys | 2.3 |
| 14. | Thornburg, Tyler | (tda81) | Portland Penguins | 2.3 |
| 15. | Kimbrel, Craig | (johnjohnson22) | Bow Tie Village Ball Talk | 2.3 |
| 16. | Miller, Andrew | (ColinBoucher) | Alpha Bet City 🔤's | 2.3 |
| 17. | Miller, Andrew | (Barefootstomp) | Appalachian Moonshiners | 2.3 |
| 18. | Marmol, Carlos | (plpl512) | Portland Beavers | 2.3 |
| 19. | Betances, Dellin | (maharacer) | Hopland Hoppers | 2.4 |
| 20. | Davis, Wade | (Trulaia) | Scranton Ducks | 2.3 |
| 21. | Hader, Josh | (gate-mouth) | Humbolt 💰⚾ | 2.4 |
| 22. | Jansen, Kenley | (Zigwiggity) | Scobey Sharks | 2.4 |
| 23. | Saucier, Kevin | (ThEiRoNhOrSe04) | Australian Swingin' Dingo | 2.4 |
| 24. | Boxberger, Brad | (LDJS1947) | NEW HAMBURG BOMBERS | 2.4 |
| 25. | Kimbrel, Craig | (filler) | Woodstone Warriors | 2.4 |
| 26. | Oh, Seung-hwan | South Dakota Dragons | 2.5 | |
| 27. | Chapman, Aroldis | (rfb60609) | Avondale Vegetarians | 2.4 |
| 28. | Devenski, Chris | (MLBNation) | Towson Generals | 2.5 |
| 29. | Radatz, Dick | (baseball4ever) | Golden Age Memories | 2.4 |
| 30. | Ryan, B.J. | (grantmoyer) | London Lions | 2.5 |
| 31. | Chapman, Aroldis | (Jennison) | Twin Cities Twins | 2.5 |
| 32. | Chapman, Aroldis | (thakidcheng) | Minneapolis Millers | 2.5 |
| 33. | Rodriguez, Francisco | (Bluesig) | Mañondawan Monarchs | 2.5 |
| 34. | Britton, Zach | (themsm) | Alamosa Anemones 1-170⚾ | 2.5 |
| 35. | Edwards, Carl | (BigRedMachine90) | Beating My Snake | 2.5 |
| 36. | Gagne, Eric | Reading Royals | 2.5 | |
| 37. | Kimbrel, Craig | (kaline6) | Lancaster Barnstormers | 2.5 |
| 38. | Barraclough, Kyle | (jrobandsteal) | Frisco Crabs | 2.5 |
| 39. | Valverde, Jose | (crapgame) | Batting Gloves | 2.5 |
| 40. | Green, Chad | (real1Bfreak) | Portland Big Hawks | 2.5 |
| 41. | Miller, Andrew | (Bluesig) | Barañaque Black Ocelots | 2.5 |
| 42. | Adams, Mike | (tgbbirch) | Mayberry Griffins | 2.5 |
| 43. | Gagne, Eric | TU CHHS 144 | 2.6 | |
| 44. | Kimbrel, Craig | (Trulaia) | city players | 2.6 |
| 45. | Miller, Andrew | (tbandit1) | NY Arrows | 2.6 |
| 46. | Casilla, Santiago | (partin0701) | Paradise Panthers | 2.6 |
| 47. | Hader, Josh | (super) | Fargo Freeze | 2.6 |
| 48. | Feliz, Neftali | (Consigliere33) | Chicago Cubs | 2.6 |
| 49. | Kimbrel, Craig | TU CHHS 197 | 2.6 | |
| 50. | Wagner, Billy | (tbone34) | Texas Tomahawks | 2.6 |