Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Losses)
| 1. | Abreu, Jose | (drauch91) | Ba Sing Se Apaches | 0 |
| 2. | Altuve, Jose | (jbenson) | Iowa Southpaws | 0 |
| 3. | Andrus, Elvis | (jbenson) | Iowa Southpaws | 0 |
| 4. | Arenado, Nolan | (FrozenRose) | Northwind Ice | 0 |
| 5. | Bautista, Jose | santo poco amigos | 0 | |
| 6. | Beltre, Adrian | (Cuttr42) | Wakanda Black Panthers | 0 |
| 7. | Betts, Mookie | (Cuttr42) | Wakanda Black Panthers | 0 |
| 8. | Bogaerts, Xander | Gloucester Ringers | 0 | |
| 9. | Bruce, Jay | Los Angeles Sharks | 0 | |
| 10. | Bryant, Kris | Texas Studs 1-895 | 0 | |
| 11. | Cabrera, Melky | (drauch91) | Ba Sing Se Apaches | 0 |
| 12. | Calhoun, Kole | (ricksrookies) | Ricks Rookies | 0 |
| 13. | Carpenter, Matt | santo poco amigos | 0 | |
| 14. | Carter, Chris | (FrozenRose) | Northwind Ice | 0 |
| 15. | Castellanos, Nick | Ruhengeri Rhinos | 0 | |
| 16. | Castillo, Welington | Texas Studs 1-895 | 0 | |
| 17. | Castro, Starlin | Texas Studs 1-895 | 0 | |
| 18. | Cespedes, Yoenis | santo poco amigos | 0 | |
| 19. | Crawford, Brandon | (Cuttr42) | Wakanda Black Panthers | 0 |
| 20. | Dahl, David | El Paso Toros | 0 | |
| 21. | Davis, Chris | El Paso Toros | 0 | |
| 22. | Davis, Rajai | (jbenson) | Iowa Southpaws | 0 |
| 23. | Desmond, Ian | Texas Studs 1-895 | 0 | |
| 24. | Dozier, Brian | Ruhengeri Rhinos | 0 | |
| 25. | Duvall, Adam | South Denver Snow | 0 | |
| 26. | Eaton, Adam | (Cuttr42) | Wakanda Black Panthers | 0 |
| 27. | Encarnacion, Edwin | (jbenson) | Iowa Southpaws | 0 |
| 28. | Escobar, Alcides | (drauch91) | Ba Sing Se Apaches | 0 |
| 29. | Franco, Maikel | (ricksrookies) | Ricks Rookies | 0 |
| 30. | Frazier, Todd | (ricksrookies) | Ricks Rookies | 0 |
| 31. | Freeman, Freddie | (drauch91) | Ba Sing Se Apaches | 0 |
| 32. | Gardner, Brett | Gloucester Ringers | 0 | |
| 33. | Goldschmidt, Paul | santo poco amigos | 0 | |
| 34. | Gonzalez, Carlos | (FrozenRose) | Northwind Ice | 0 |
| 35. | Grandal, Yasmani | (ricksrookies) | Ricks Rookies | 0 |
| 36. | Gregorius, Didi | Ruhengeri Rhinos | 0 | |
| 37. | Hamilton, Billy | Ruhengeri Rhinos | 0 | |
| 38. | Healy, Ryon | El Paso Toros | 0 | |
| 39. | Hernandez, Cesar | (FrozenRose) | Northwind Ice | 0 |
| 40. | Herrera, Odubel | Texas Studs 1-895 | 0 | |
| 41. | Hosmer, Eric | South Denver Snow | 0 | |
| 42. | Inciarte, Ender | (ricksrookies) | Ricks Rookies | 0 |
| 43. | Kemp, Matt | South Denver Snow | 0 | |
| 44. | Kinsler, Ian | Gloucester Ringers | 0 | |
| 45. | Kipnis, Jason | Los Angeles Sharks | 0 | |
| 46. | LeMahieu, DJ | (ricksrookies) | Ricks Rookies | 0 |
| 47. | Leon, Sandy | santo poco amigos | 0 | |
| 48. | Lindor, Francisco | South Denver Snow | 0 | |
| 49. | Longoria, Evan | (FrozenRose) | Northwind Ice | 0 |
| 50. | Lucroy, Jonathan | South Denver Snow | 0 |