Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Innings)
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. | Fujimoto, Hideo | (gibblets1973) | Bally Haly Bay Stars | 315.0 |
| 2. | Fujimoto, Hideo | (03prophet) | Kubasaki Sabotage | 308.1 |
| 3. | Fujimoto, Hideo | (dunroche) | Fujiyoshida Shining Wizards | 307.2 |
| 4. | Fujimoto, Hideo | (griffenberg) | 615 この場所から出て | 306.2 |
| 5. | Fujimoto, Hideo | (DaveH) | Shochiku Robins | 304.2 |
| 6. | Rogers, Steve | (gibblets1973) | El Paso Diablos | 302.0 |
| 7. | Gooden, Dwight | (filler2) | Baltimore Orioles | 300.1 |
| 8. | Rogers, Steve | (gibblets1973) | East End Eagle | 300.0 |
| 9. | Sutton, Don | (gibblets1973) | Badger Bulldogs | 300.0 |
| 10. | Walsh, Ed | (filler8) | Louisville Colonels | 299.2 |
| 11. | Starffin, Victor | (TemporaryPizza) | Kobē Blue Wave | 299.2 |
| 12. | Fujimoto, Hideo | (Trulaia) | Boston Bees | 299.2 |
| 13. | Marichal, Juan | (Vanderj6993) | Fila Eskimos | 298.2 |
| 14. | McNally, Dave | (Vanderj6993) | Fila Eskimos | 297.1 |
| 15. | Vance, Dazzy | (gibblets1973) | Boomtown Broncos | 297.1 |
| 16. | Starffin, Victor | (gibblets1973) | Bally Haly Bay Stars | 297.1 |
| 17. | Starffin, Victor | 茨木市 どうじ | 297.0 | |
| 18. | Hecker, Guy | (gibblets1973) | Gander Flyers | 297.0 |
| 19. | Fujimoto, Hideo | (DaveH) | Shochiku Robins | 296.2 |
| 20. | McNally, Dave | (Vanderj6993) | Fila Eskimos | 296.1 |
| 21. | Martinez, Pedro | (babyave1) | Boston BigHats | 296.1 |
| 22. | Johnson, Walter | (REVEJB) | Joyce Brothers | 296.1 |
| 23. | Marichal, Juan | (tjm) | Mighty Ballplayers | 296.0 |
| 24. | Carlton, Steve | (gibblets1973) | Badger Bulldogs | 296.0 |
| 25. | Fujimoto, Hideo | (gibblets1973) | Bally Haly Bay Stars | 296.0 |
| 26. | Blue, Vida | (gibblets1973) | Swift Current NL Swords | 295.2 |
| 27. | Gooden, Dwight | (gibblets1973) | Portland Creek Pirates | 295.1 |
| 28. | Scott, Mike | (gibblets1973) | Paradise Bird | 295.1 |
| 29. | Blue, Vida | (gibblets1973) | Ellston Eagles | 295.1 |
| 30. | Tiant, Luis | (tjm) | Mighty Ballplayers | 295.0 |
| 31. | Alexander, Pete | (Shpennymons) | Puzley Croswerdes | 295.0 |
| 32. | Tiant, Luis | (Vanderj6993) | Fila Eskimos | 294.2 |
| 33. | Tiant, Luis | (Vanderj6993) | Fila Eskimos | 294.2 |
| 34. | Gibson, Bob | (dunroche) | Gotham Giants | 294.2 |
| 35. | Koufax, Sandy | (Vanderj6993) | Fila Eskimos | 294.1 |
| 36. | Tiant, Luis | (gibblets1973) | St. John's Saints | 294.0 |
| 37. | Gibson, Bob | (gibblets1973) | St. John's Saints | 293.2 |
| 38. | Seaver, Tom | (gibblets1973) | Swift Current NL Swords | 293.2 |
| 39. | Gibson, Bob | (masimo29) | Brooklyn Robins | 293.2 |
| 40. | Sutton, Don | (Sabotage) | South Dakota Sabotage | 293.2 |
| 41. | Clemens, Roger | (DaveMagadan) | Scranton Branches | 293.1 |
| 42. | Gooden, Dwight | (Burrellfan1) | Tulsa Drillers | 293.1 |
| 43. | Gibson, Bob | (richgibson) | Larks ENCHANTMENTS | 293.1 |
| 44. | Starffin, Victor | (TemporaryPizza) | Kobē Blue Wave | 293.1 |
| 45. | Seaver, Tom | (gibblets1973) | East End Eagle | 293.0 |
| 46. | Vance, Dazzy | (filler8) | Tennessee Studs | 293.0 |
| 47. | Vance, Dazzy | (gibblets1973) | Deep Bay Ducks | 293.0 |
| 48. | Gibson, Bob | (dunroche) | Tampa Bay Buccaneers | 293.0 |
| 49. | Tiant, Luis | (Vanderj6993) | Fila Eskimos | 293.0 |
| 50. | Bessho, Takehiko | Shanghi Hawks | 293.0 |
