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. | Bonds, Barry | (roguerouge) | Cape Town Prawns | .828 |
| 2. | Bonds, Barry | (Pman) | Nassau’s Michael G | .818 |
| 3. | Ruth, Babe | (sumo6901) | Columbia Lions | .817 |
| 4. | Bonds, Barry | Way Down Yonder Chatahoochies | .815 | |
| 5. | Bonds, Barry | (shane211) | South Dakota Grasshoppers | .813 |
| 6. | Bonds, Barry | (Jericho2u) | Honolulu Hooters | .808 |
| 7. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .806 |
| 8. | Bonds, Barry | (dbutts) | South Dakota Farewells | .805 |
| 9. | Bonds, Barry | (shelley71) | Middle Earth White Walkers | .805 |
| 10. | Bonds, Barry | (WorcWarr) | Worcester Warriors | .803 |
| 11. | Bonds, Barry | Columbus Braves | .802 | |
| 12. | Bonds, Barry | (Charlie22) | Glacier Peaks | .798 |
| 13. | Ruth, Babe | (wadesayles) | Nebo Bluebirds | .794 |
| 14. | Bonds, Barry | (iamcota) | Rockingham Renegados | .793 |
| 15. | Bonds, Barry | (smoussette12) | Boston NightHawks | .793 |
| 16. | Ruth, Babe | (Warrior) | Miami Dolphins | .791 |
| 17. | Bonds, Barry | (shelley71) | Middle Earth White Walkers | .791 |
| 18. | Bonds, Barry | (mckarcher) | Punxsutawney Phils | .791 |
| 19. | Bonds, Barry | Way Down Yonder Chatahoochies | .791 | |
| 20. | Gehrig, Lou | (richgibson) | Kazoo SDS | .790 |
| 21. | Gallo, Joey | (Bluesig) | Barañaque Black Ocelots | .790 |
| 22. | Gallo, Joey | Tom bed | .788 | |
| 23. | Bonds, Barry | (Myunclepunk) | Chicago Spirit | .788 |
| 24. | Hoskins, Rhys | (Bluesig) | Warihatag Wolves | .788 |
| 25. | McGwire, Mark | (kingstreet) | Singapore Dragons | .788 |
| 26. | Bonds, Barry | (RelvinMelvin) | THE GOP | .786 |
| 27. | Gallo, Joey | (Trashfactory) | Haven Village Spartans | .786 |
| 28. | Olson, Matt | (Jrobandsteal) | Spring Arbor Stallions | .785 |
| 29. | Bonds, Barry | (mmeler) | Seattle Bulls | .784 |
| 30. | Bonds, Barry | (pamash07) | Portland Drumsticks | .784 |
| 31. | Bonds, Barry | Baltimore Orioles | .782 | |
| 32. | Bonds, Barry | (kds4316) | San Antonio Missions | .782 |
| 33. | Bonds, Barry | (jpcortez) | Cooperstown Poodles | .782 |
| 34. | Olson, Matt | (BigRedMachine90) | We Are The Champions | .780 |
| 35. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .780 |
| 36. | Bagwell, Jeff | (Artinshki) | Minnesota Charlie Browns | .780 |
| 37. | Bagwell, Jeff | (Mortamar1966) | Ridge Harbor Lead Bellies | .779 |
| 38. | Ruth, Babe | (mplsgreg) | St. Cloud Huskies | .778 |
| 39. | Voit, Luke | (louisfelix) | Bilbao Bulls | .778 |
| 40. | Bonds, Barry | (andrewclovell) | Ithaca Bombers | .778 |
| 41. | Voit, Luke | (filler) | Westlake Village Tanks | .777 |
| 42. | O'Hearn, Ryan | (MLBnation) | Portland Beavers | .777 |
| 43. | Bonds, Barry | (mickey7) | The Last Boy Scout | .776 |
| 44. | Bonds, Barry | (noleary) | Baltimore Giants | .776 |
| 45. | Voit, Luke | (Cg4177) | Houston Mavericks | .776 |
| 46. | Voit, Luke | (ColinBoucher) | Derelict Winos | .775 |
| 47. | Ruth, Babe | (Fungoking) | Fletcher Fireballs | .775 |
| 48. | Ruth, Babe | (PARATROOPER22) | SEASAME STREET BIG BIRDS | .775 |
| 49. | Bonds, Barry | (Bluesig) | Abuluñablanca D-Fence | .775 |
| 50. | Bonds, Barry | (ginkster) | Toledo Stallions | .774 |