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. | Ruth, Babe | (bostontex24) | Boston Meerkats | .837 |
| 2. | Ruth, Babe | (TStevanovich) | Shovel Boys | .834 |
| 3. | Bonds, Barry | (kingstreet) | Singapore Slingers | .833 |
| 4. | Bonds, Barry | (NUWildcats) | The Dangerous Alliance | .825 |
| 5. | Bonds, Barry | (pickle3557) | Carver Crappies | .823 |
| 6. | Ruth, Babe | (teamkev24) | Desert Monuments | .817 |
| 7. | Bonds, Barry | (djeter2) | Tuchen Patriots | .817 |
| 8. | Bonds, Barry | (cornliquor) | Alabama Abominations | .816 |
| 9. | Bonds, Barry | (sgt714) | Boston Americans | .813 |
| 10. | Ruth, Babe | (Bears19) | Harford County Cavemen | .810 |
| 11. | Bonds, Barry | (Jett717) | Ferengi Profiteers | .808 |
| 12. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .806 |
| 13. | Bonds, Barry | (Yankees1927) | Jersey Shore Juggernauts | .805 |
| 14. | Bonds, Barry | (dynasty) | Columbus Braves | .802 |
| 15. | Bonds, Barry | (jamin) | Chester Springs Menjai | .802 |
| 16. | Ruth, Babe | (Littlereb) | British Bull Dawgs | .801 |
| 17. | Bonds, Barry | (loucat23) | Colorado SkySoxx | .800 |
| 18. | Bonds, Barry | (wileydog97) | Chicago Dragons | .799 |
| 19. | Bonds, Barry | (Charlie22) | Glacier Peaks | .798 |
| 20. | Bonds, Barry | (kingpin825) | olympia storm | .797 |
| 21. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .795 |
| 22. | Gehrig, Lou | (mickey7) | San Francisco Seals | .794 |
| 23. | Ruth, Babe | (ayj88) | Rabid Rabbits | .794 |
| 24. | Bonds, Barry | (cubs99) | Palm Beach Sharks | .793 |
| 25. | Bonds, Barry | (MLBnation) | Norfolk NightHawks | .793 |
| 26. | Ruth, Babe | (Warrior) | Miami Dolphins | .791 |
| 27. | Bonds, Barry | (Yankees1927) | Jersey Shore Juggernauts | .791 |
| 28. | Bonds, Barry | (Slippingjimmy) | Chittenango Wizards of Oz | .791 |
| 29. | Gehrig, Lou | (richgibson) | Haymarket STRIKERS | .790 |
| 30. | Ruth, Babe | (Son_of_Soul) | Surprise Arizona Partiers | .790 |
| 31. | Bonds, Barry | (Myunclepunk) | Chicago Spirit | .788 |
| 32. | Ruth, Babe | (Robhawkva) | Roanoke Renegades | .787 |
| 33. | Bonds, Barry | (PalinJames) | Erie Fighters | .787 |
| 34. | Bonds, Barry | (baseballjjay) | SLC Shuriken's | .785 |
| 35. | Olson, Matt | (gamebreaker) | Upstate Gators | .785 |
| 36. | Bonds, Barry | (chapman) | Huntington Hawks | .784 |
| 37. | Bonds, Barry | (pamash07) | Portland Drumsticks | .784 |
| 38. | Bonds, Barry | (ClassicOs) | Baltimore Orioles | .782 |
| 39. | Bonds, Barry | (kds4316) | San Antonio Missions | .782 |
| 40. | Bonds, Barry | (jpcortez) | Cooperstown Poodles | .782 |
| 41. | Bonds, Barry | (beck) | Pasadena Cowpokes | .781 |
| 42. | Ruth, Babe | (philtomney) | Cleveland Wide Awakes | .781 |
| 43. | Bonds, Barry | (filler) | Crouching Tiger Hidden Dragons | .780 |
| 44. | Gehrig, Lou | (philtomney) | Cleveland Wide Awakes | .780 |
| 45. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .780 |
| 46. | Bonds, Barry | (paranoid) | The Meadows CaballerosDeOro | .780 |
| 47. | Bagwell, Jeff | (Mortamar1966) | Ridge Harbor Lead Bellies | .779 |
| 48. | Bonds, Barry | (super) | Adirondack Sluggers | .779 |
| 49. | Voit, Luke | (bend) | Bilbao Bulls | .778 |
| 50. | Bonds, Barry | (andrewclovell) | Ithaca Bombers | .778 |