Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Slugging)
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. | Schneider, Davis | (filler) | Kentucky Horses | .918 |
| 2. | McGwire, Mark | San Diego Gwynns | .873 | |
| 3. | Carpenter, Matt | (jeffery2323) | Halifax Hatchet Women | .872 |
| 4. | Carpenter, Matt | (doughboys) | Vegas Knights | .862 |
| 5. | Schneider, Davis | (ColinBoucher) | Relentlessly Competent | .859 |
| 6. | Carpenter, Matt | (rennies) | London Calling | .857 |
| 7. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 8. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 9. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 10. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 11. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 12. | Carpenter, Matt | (BAR23) | Atlanta Gorillas | .851 |
| 13. | Bonds, Barry | (BAR23) | Dallas Mustangs | .838 |
| 14. | Schneider, Davis | (bwoodcoc) | Salem Demons | .837 |
| 15. | Carpenter, Matt | (jim2miller) | Elkhart Blue Blazers | .836 |
| 16. | Carpenter, Matt | (BAR23) | ROYAL HILL LIONS | .833 |
| 17. | Carpenter, Matt | (ColinBoucher) | Rancho Cucamonga Quakes | .830 |
| 18. | Carpenter, Matt | (dynasty8) | San Diego Sharks | .827 |
| 19. | Schneider, Davis | (Jake40h) | Kentucky Horses | .827 |
| 20. | Bonds, Barry | (WorcWarr) | Worcester Warriors | .826 |
| 21. | Carpenter, Matt | (ssrice123) | Cleburne Railroaders | .826 |
| 22. | Schneider, Davis | (marknym) | Raleigh Caps | .825 |
| 23. | Hoskins, Rhys | (lasershow) | Iowa Cornhuskers | .824 |
| 24. | Schneider, Davis | (walle-1) | Boston Bees | .820 |
| 25. | Schneider, Davis | (ColinBoucher) | Thago Mizers | .820 |
| 26. | Schneider, Davis | (dynasty) | Las Vegas Gladiators | .820 |
| 27. | Bonds, Barry | (Trulaia) | Revenge of Samson | .819 |
| 28. | Carpenter, Matt | (foe323llle) | Kennebunkport Kismet | .819 |
| 29. | Carpenter, Matt | (walle-2) | Miami Serpents | .818 |
| 30. | Carpenter, Matt | (ColinBoucher) | Dunning Kruger Dotards | .817 |
| 31. | Carpenter, Matt | (chott) | Macon Friends | .817 |
| 32. | Carpenter, Matt | (shane211) | South Dakota Snakes | .816 |
| 33. | Carpenter, Matt | (jeter0296) | Staten Island Yankees | .816 |
| 34. | Carpenter, Matt | (danmcvay1) | PBC Phillies | .813 |
| 35. | Carpenter, Matt | (ColinBoucher) | ‘Sota BobbleVikes | .812 |
| 36. | Carpenter, Matt | (ewhuynh56) | Phoenix Dragons | .810 |
| 37. | Carpenter, Matt | (nmiller4) | Cincinnati Reds | .808 |
| 38. | Carpenter, Matt | (cunnythumber) | Cedar Rapids Kernels | .807 |
| 39. | Schneider, Davis | (Schvitz) | Milwaukee Thiefs | .806 |
| 40. | Bonds, Barry | (mdmatheson) | Sacramento Solons | .805 |
| 41. | Carpenter, Matt | (gpsman) | Detroit Tigers | .805 |
| 42. | Bonds, Barry | (kosmosis) | Texas Outlaws | .805 |
| 43. | Carpenter, Matt | (ColinBoucher) | Relentlessly Competent | .805 |
| 44. | Bonds, Barry | (kosmosis) | Texas Outlaws | .804 |
| 45. | Carpenter, Matt | (BAR23) | Vancouver Pantheon | .804 |
| 46. | Carpenter, Matt | (xaxa) | MISSOURI MULES | .803 |
| 47. | Bonds, Barry | (Artinshki) | Base Ball Classics | .803 |
| 48. | Carpenter, Matt | (filler) | Miami Serpents | .802 |
| 49. | Carpenter, Matt | (mikep33) | Oak Lawn Spartans | .802 |
| 50. | Carpenter, Matt | (BAR23) | Portland Vikings | .801 |
