Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Defense)
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. | Smith, Ozzie | (kingstreet) | Singapore Slingers | 2 |
| 2. | Smith, Ozzie | (michelb3514) | Iowa Corn Pickers | 2 |
| 3. | Belanger, Mark | (ClassicOs) | Baltimore Orioles | 0 |
| 4. | Smith, Ozzie | (jamin) | Chester Springs Menjai | 1 |
| 5. | Smith, Ozzie | (michelb3514) | Iowa Corn Pickers | 0 |
| 6. | Frisch, Frankie | (jamin) | Chester Springs Menjai | 2 |
| 7. | Belanger, Mark | (kingstreet) | Singapore Slingers | 6 |
| 8. | Brinkman, Ed | (Mranastasia) | Texas Rangers | 4 |
| 9. | Banks, Ernie | (Gate-mouth) | Humbolt 💰⚾ | 23 |
| 10. | Griffey, Ken | (Littlereb) | Seattle Mariners | 48 |
| 11. | Banks, Ernie | (LDJS1947) | MISSOURI TIGERS | 33 |
| 12. | Boudreau, Lou | (Novotny34) | Chicago Frisbees | 8 |
| 13. | Boudreau, Lou | (baseball4ever) | Elephant Walk | 17 |
| 14. | Hansen, Ron | (Jayslater1223) | 09-54-64-67 Chicago Black Sox | 15 |
| 15. | Campaneris, Bert | (Doceagle) | OAK OAK | 1 |
| 16. | Versalles, Zoilo | (mickey7) | Metry Dolphins | 11 |
| 17. | White, Devon | (Slippingjimmy) | Chittenango Diamonds | 7 |
| 18. | Griffey, Ken | (gate-mouth) | Humbolt 💰⚾ | 35 |
| 19. | Brinkman, Ed | (jim2miller) | Capital City Nighthawks | 0 |
| 20. | Smith, Ozzie | (kingstreet) | Singapore Slingers | 1 |
| 21. | Jones, Andruw | (michelb3514) | Iowa Corn Pickers | 19 |
| 22. | Frisch, Frankie | (jamin) | Chester Springs Menjai | 4 |
| 23. | Valentin, John | Somewhereville Killer Bees | 14 | |
| 24. | Ripken, Cal | (Slippingjimmy) | Chittenango Diamonds | 21 |
| 25. | Cronin, Joe | (sheikyerboudi) | 12th Man Google Calamity | 6 |
| 26. | Parra, Gerardo | (michelb3514) | Dayton Rangers | 8 |
| 27. | Ripken, Cal | (nickachap) | Detroit Rock City | 23 |
| 28. | Stearns, John | (teamkev24) | Saturday Night Fever | 6 |
| 29. | Gomez, Carlos | (acr0320) | Rancho Grande Rottweilers | 25 |
| 30. | Patek, Freddie | (Jayslater1223) | 72-78-89-14 K.C. Tinfoil Royals | 0 |
| 31. | Evers, Johnny | (michelb3514) | Iowa Corn Pickers | 0 |
| 32. | Turner, Terry | (sheikyerboudi) | High Desert Meercats | 0 |
| 33. | Jones, Andruw | (ThEiRoNhOrSe04) | Toledo Mud Hens | 21 |
| 34. | Boudreau, Lou | (Baseballbob) | Roanoke Red Nexx | 18 |
| 35. | Ripken, Cal | (thunderstruck) | Rogue Valley RENEGADES | 11 |
| 36. | Smith, Ozzie | (Slippingjimmy) | Chittenango Diamonds | 2 |
| 37. | Ripken, Cal | (link182) | Bikini Bottom Sponges | 15 |
| 38. | Hall, Bill | (Don55) | New York Highlanders | 27 |
| 39. | Frisch, Frankie | (gate-mouth) | Humbolt 💰⚾ | 2 |
| 40. | Lindor, Francisco | Saddam's WMDs IV | 35 | |
| 41. | Smith, Ozzie | (michelb3514) | Iowa Corn Pickers | 0 |
| 42. | Simmons, Andrelton | Vancouver Canada | 9 | |
| 43. | Vizquel, Omar | (Jason1216) | Lousiville Sluggers | 6 |
| 44. | Banks, Ernie | (super) | Dallas Barking Doggies | 33 |
| 45. | Mays, Willie | (paranoid) | Las Vegas Pit Vipers | 28 |
| 46. | Lajoie, Nap | CLE CLE | 0 | |
| 47. | Griffey, Ken | (Gate-mouth) | Humbolt 💰⚾ | 31 |
| 48. | Wills, Maury | (jrobandsteal) | Hollywood Trolley Dodgers | 0 |
| 49. | Harrelson, Bud | (tylang) | Bronx Bombers | 0 |
| 50. | Erstad, Darin | (Michelb3514) | Iowa Corn Pickers | 5 |