Favorite Teams leagues are not included in Single-Season records. Records only remain for 10 seasons.
Single-Season Leaders (Blocks)
| 1. | Bol, Manute | (dynasty) | Phoenix Suns | 567 |
| 2. | Eaton, Mark | (Trilling) | LA Showtime | 478 |
| 3. | Bol, Manute | (Trilling) | LA Showtime | 471 |
| 4. | Eaton, Mark | (dmcleaner) | Grand Haven Buccaneers | 471 |
| 5. | Eaton, Mark | (dmcleaner) | Grand Haven Buccaneers | 456 |
| 6. | Eaton, Mark | (maulucci16) | Norman Walker | 446 |
| 7. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 446 |
| 8. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 438 |
| 9. | Eaton, Mark | (Trilling) | LA Showtime | 438 |
| 10. | Eaton, Mark | (maulucci16) | Norman Walker | 438 |
| 11. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 432 |
| 12. | Mutombo, Dikembe | (MPTrey) | New New York Yankees | 427 |
| 13. | Eaton, Mark | (dshearer) | Boston Bulldogs | 425 |
| 14. | Eaton, Mark | (maulucci16) | Norman Walker | 422 |
| 15. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 418 |
| 16. | Eaton, Mark | (filler) | New Jersey Nets | 418 |
| 17. | Bol, Manute | (walle-1) | Toronto Tigers | 415 |
| 18. | Eaton, Mark | (walle-1) | New Jersey Devils | 414 |
| 19. | Eaton, Mark | (dshearer) | Boston Bulldogs | 411 |
| 20. | Olajuwon, Hakeem | (disturbed) | Sacramento Lions | 407 |
| 21. | Mutombo, Dikembe | San Diego Sharks | 406 | |
| 22. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 404 |
| 23. | Eaton, Mark | (maulucci16) | Norman Walker | 403 |
| 24. | Eaton, Mark | (filler) | Minnesota Frogs | 402 |
| 25. | Eaton, Mark | (filler) | New Jersey Nets | 398 |
| 26. | Mutombo, Dikembe | (Mav54) | Miami Cats | 398 |
| 27. | Eaton, Mark | (dshearer) | Boston Bulldogs | 396 |
| 28. | Eaton, Mark | (maulucci16) | Norman Walker | 395 |
| 29. | Hayes, Elvin | (jamin) | Chester Springs Menjai | 394 |
| 30. | Eaton, Mark | (dynasty) | Portland Vikings | 393 |
| 31. | Robinson, David | (shane211) | South Dakota Tigers | 389 |
| 32. | Robinson, David | (Mav54) | Miami Cats | 386 |
| 33. | Robinson, David | (walle-1) | Iowa Pigs | 384 |
| 34. | Mutombo, Dikembe | (chasherm) | Madison Comets | 383 |
| 35. | Eaton, Mark | (maulucci16) | Norman Walker | 383 |
| 36. | Olajuwon, Hakeem | Boston Bees | 383 | |
| 37. | Eaton, Mark | (dshearer) | Boston Bulldogs | 382 |
| 38. | Eaton, Mark | (dshearer) | Boston Bulldogs | 380 |
| 39. | Olajuwon, Hakeem | Montana Ducks | 378 | |
| 40. | Mutombo, Dikembe | (filler8) | Pittsburgh Plunder | 378 |
| 41. | Olajuwon, Hakeem | (BamaTrashman) | Alabama Arsenal | 375 |
| 42. | Bol, Manute | (dmcleaner) | Grand Haven Buccaneers | 374 |
| 43. | Mutombo, Dikembe | Boston Bees | 373 | |
| 44. | Olajuwon, Hakeem | (filler) | Alaska Red Bears | 372 |
| 45. | Eaton, Mark | (roguerouge) | Charlotte Hornets | 372 |
| 46. | Olajuwon, Hakeem | Boston Bees | 372 | |
| 47. | Mutombo, Dikembe | (filler) | Seattle Sloths | 371 |
| 48. | Mutombo, Dikembe | (filler) | Seattle Sloths | 371 |
| 49. | Bol, Manute | (dshearer) | Boston Bulldogs | 371 |
| 50. | Eaton, Mark | (dshearer) | Boston Bulldogs | 371 |
