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. | Olson, Matt | (LilRed2806) | GAS HOUSE DIZZY n DAFFY | .850 |
| 2. | Bonds, Barry | (rreebe916) | San Diego WOBS🇺🇦 | .838 |
| 3. | Bonds, Barry | Team Team | .835 | |
| 4. | Hoskins, Rhys | (michelb3514) | Iowa Corn Pickers | .824 |
| 5. | Bonds, Barry | (Trulaia) | Revenge of Samson | .819 |
| 6. | Bonds, Barry | (timyoung) | PIttsburgh Crawfords | .818 |
| 7. | Bonds, Barry | (searcy) | Oklahoma Mavericks | .817 |
| 8. | Bonds, Barry | (wduncan) | Friday Knight Frogs | .815 |
| 9. | McGwire, Mark | (tda81) | SF Demons | .811 |
| 10. | Bonds, Barry | (paranoid) | Las Vegas Desert Knights | .809 |
| 11. | Bonds, Barry | (broles) | Bloomington Blue Bombers | .806 |
| 12. | Bonds, Barry | (Majestic44) | Fillmore Bulldogs | .805 |
| 13. | Bonds, Barry | (broles) | Bloomington Blue Bombers | .805 |
| 14. | Bonds, Barry | (ginkster) | Las Vegas Luckys | .804 |
| 15. | Bonds, Barry | (ClassicOs) | Baltimore Orioles | .804 |
| 16. | Gallo, Joey | (Trulaia) | CC Cats | .803 |
| 17. | Soto, Juan | (tda81) | CC Cuties | .800 |
| 18. | Hoskins, Rhys | (michelb3514) | Iowa Corn Pickers | .799 |
| 19. | Bonds, Barry | (andyyoung) | Hollywood Stars | .797 |
| 20. | Bonds, Barry | (dunroche) | Toledo Mudhens | .795 |
| 21. | Bonds, Barry | (filler) | Iowa Tractors | .793 |
| 22. | Bonds, Barry | (Zigwiggity) | Apple Valley Apes | .792 |
| 23. | Bonds, Barry | (michelb3514) | Iowa Corn Pickers | .792 |
| 24. | Acuna, Ronald | (joemcg) | OC Panthers | .792 |
| 25. | Bonds, Barry | (Trulaia) | Los Angeles 24ers | .792 |
| 26. | Bonds, Barry | (mckarcher) | Emerald City Archers | .791 |
| 27. | Bonds, Barry | (wduncan) | Friday Knight Frogs | .791 |
| 28. | Bonds, Barry | (Artinshki) | Minnesota Charlie Browns | .791 |
| 29. | Gallo, Joey | (ArcticWolf30) | Sundari Mandalorians | .790 |
| 30. | Bonds, Barry | (Artinshki) | Base Ball Homers | .789 |
| 31. | Gallo, Joey | (WettMelons) | Wett Melons | .788 |
| 32. | Hoskins, Rhys | (Chubbach24) | Minnesota Timberwolves | .788 |
| 33. | McGwire, Mark | (wileydog97) | Raleigh Red Devils | .788 |
| 34. | Trout, Mike | (paranoid) | Las Vegas Chaos II | .787 |
| 35. | Bonds, Barry | (richp) | Loan Sharks | .786 |
| 36. | Gallo, Joey | (JohnHeidy) | Greensboro Gators | .786 |
| 37. | McGwire, Mark | (rainman) | Dodge City Deputies | .785 |
| 38. | Bonds, Barry | (Iceman18) | New York Mets | .785 |
| 39. | Acuna, Ronald | (mbeiser9999) | Maryville Bass | .784 |
| 40. | Bonds, Barry | (Tiger123) | Portland Drumsticks | .784 |
| 41. | Bonds, Barry | (GLOBEXcorp) | GLOBEX Corporation | .782 |
| 42. | Bonds, Barry | (ikej) | Maine No B.S. | .782 |
| 43. | Smith, Will | (donnpall) | Las Vegas Sun Sox | .781 |
| 44. | Ruth, Babe | (tribetime89) | Anicent Warriors | .781 |
| 45. | Bonds, Barry | (tbandit1) | Long Island Ducks | .781 |
| 46. | Bonds, Barry | Auckerman Descendents | .780 | |
| 47. | Olson, Matt | (Egaunay) | Philadelphia Wyverns | .780 |
| 48. | Bonds, Barry | (sgt714) | Boston Red Sox | .777 |
| 49. | Belt, Brandon | (mcvn4) | Carpool Champions | .777 |
| 50. | Bonds, Barry | (broles) | Bloomington Blue Bombers | .776 |