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 | (SyndicateLG) | Rockin' Robins | 1.4 |
| 2. | Hand, Brad | (cuey82) | Harrisburg Lookouts | 1.9 |
| 3. | Jansen, Kenley | (sgt714) | Boston Americans V | 1.9 |
| 4. | Bottalico, Ricky | (jim2miller) | Ohio Bandits | 2.1 |
| 5. | Valverde, Jose | (Buttermaker) | Saint-Louis C.K's | 2.1 |
| 6. | Allen, Cody | (htennis) | John Gibson For the Vezina | 2.1 |
| 7. | McHugh, Collin | (Barefootstomp) | Appalachian Moonshiners | 2.2 |
| 8. | Jansen, Kenley | (SilverFox) | Lakeland Flying Tigers | 2.2 |
| 9. | Britton, Zach | (skieff) | Hustons Mill YardHawks | 2.2 |
| 10. | Burns, Todd | (Mranastasia) | Cox Tuggers | 2.2 |
| 11. | Dibble, Rob | (dbutts) | Burlington Bees | 2.3 |
| 12. | Edwards, Carl | (dynasty) | Denver Demon Donkeys | 2.3 |
| 13. | Thornburg, Tyler | (mattholland1975) | Arlington Athletics | 2.3 |
| 14. | Miller, Andrew | (Barefootstomp) | Appalachian Moonshiners | 2.3 |
| 15. | Marmol, Carlos | (plpl512) | Portland Beavers | 2.3 |
| 16. | Betances, Dellin | (maharacer) | Hopland Hoppers | 2.4 |
| 17. | Hader, Josh | (gate-mouth) | Humbolt 💰⚾ | 2.4 |
| 18. | Jansen, Kenley | (Zigwiggity) | Scobey Sharks | 2.4 |
| 19. | Saucier, Kevin | (tw_gk) | Little Rock Devils | 2.4 |
| 20. | Boxberger, Brad | (richgibson) | Asbury Park LUMPEN PROLS | 2.4 |
| 21. | Kimbrel, Craig | (filler) | Woodstone Warriors | 2.4 |
| 22. | Oh, Seung-hwan | (shel6) | Altoona Curve | 2.5 |
| 23. | Chapman, Aroldis | (Lester) | Avondale Vegetarians | 2.4 |
| 24. | Radatz, Dick | (baseball4ever) | Golden Age Memories | 2.4 |
| 25. | Ryan, B.J. | (grantmoyer) | London Lions | 2.5 |
| 26. | Chapman, Aroldis | (tgoert) | Twin Cities Twins | 2.5 |
| 27. | Chapman, Aroldis | (MLBNation) | Minneapolis Millers | 2.5 |
| 28. | Britton, Zach | (hunterhawke) | Halifax West Yard Goats | 2.5 |
| 29. | Edwards, Carl | (BigRedMachine90) | Beating My Snake | 2.5 |
| 30. | Kimbrel, Craig | (jamin) | Chester Springs Menjai | 2.5 |
| 31. | Gagne, Eric | (newyank11) | Reading Royals | 2.5 |
| 32. | Kimbrel, Craig | (hoopmonkey) | Lancaster Barnstormers | 2.5 |
| 33. | Barraclough, Kyle | (habsco) | Frisco Crabs | 2.5 |
| 34. | Valverde, Jose | (whiskybiz) | Batting Gloves | 2.5 |
| 35. | Green, Chad | (saeval) | Portland Pythons | 2.5 |
| 36. | Miller, Andrew | (Bluesig) | Barañaque Black Ocelots | 2.5 |
| 37. | Adams, Mike | (tgbbirch) | Mayberry Griffins | 2.5 |
| 38. | Gagne, Eric | (filler) | TU CHHS 144 | 2.6 |
| 39. | Kimbrel, Craig | (Trulaia) | city players | 2.6 |
| 40. | Hader, Josh | (super) | Fargo Freeze | 2.6 |
| 41. | Feliz, Neftali | (Consigliere33) | Chicago Cubs | 2.6 |
| 42. | Kimbrel, Craig | (Hendu42) | Dubose Legends | 2.6 |
| 43. | Wagner, Billy | (tbone34) | Texas Tomahawks | 2.6 |
| 44. | Dotel, Octavio | (Trilling) | Thousand Oaks Thunder | 2.6 |
| 45. | Papelbon, Jonathan | (kingstreet) | Singapore Slingers | 2.6 |
| 46. | Britton, Zach | (marnez) | Sussex Sharks | 2.6 |
| 47. | Jansen, Kenley | (Demetri1377) | Twin Cities Twins | 2.6 |
| 48. | Thornburg, Tyler | (doittoitlars) | Island Coast Gators | 2.6 |
| 49. | Jansen, Kenley | (gibblets1973) | C.B.S. Sailors | 2.6 |
| 50. | Street, Huston | (mickey7) | TU CHHS 52 | 2.6 |