Most blocks in an NBA season
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Mark Eaton leads with 456 blocks in 1984-85, first of 22,117 player-seasons.
| # | Player and seasons | Value |
|---|---|---|
 Mark Eaton (1984-85 UTA)1984-85 | 456 | |
 Manute Bol (1985-86 WSB)1985-86 | 397 | |
 Hakeem Olajuwon (1989-90 HOU)1989-90 | 376 | |
| Mark Eaton (1985-86 UTA)1985-86 | 369 | |
| Mark Eaton (1983-84 UTA)1983-84 | 349 | |
 Manute Bol (1988-89 GSW)1988-89 | 345 | |
 Tree Rollins (1982-83 ATL)1982-831 of his games has no blocks recorded, so the number is short. | 342 | |
| Hakeem Olajuwon (1992-93 HOU)1992-93 | 342 | |
 Dikembe Mutombo (1993-94 DEN)1993-94 | 336 | |
 Kareem Abdul-Jabbar (1975-76 LAL)1975-762 of his games have no blocks recorded, so the number is short. | 334 | |
| Dikembe Mutombo (1995-96 DEN)1995-96 | 332 | |
 Patrick Ewing (1989-90 NYK)1989-90 | 327 | |
| Mark Eaton (1986-87 UTA)1986-87 | 321 | |
| Dikembe Mutombo (1994-95 DEN)1994-95 | 321 | |
 David Robinson (1990-91 SAS)1990-91 | 320 | |
| David Robinson (1989-90 SAS)1989-90 | 319 | |
| Kareem Abdul-Jabbar (1978-79 LAL)1978-79 | 318 | |
| Mark Eaton (1988-89 UTA)1988-89 | 315 | |
 Theo Ratliff (2003-04 ATL/POR)2003-04 | 307 | |
| David Robinson (1991-92 SAS)1991-92 | 305 | |
| Mark Eaton (1987-88 UTA)1987-88 | 304 | |
| Hakeem Olajuwon (1991-92 HOU)1991-92 | 304 | |
| Manute Bol (1986-87 WSB)1986-87 | 303 | |
| Hakeem Olajuwon (1993-94 HOU)1993-94 | 297 | |
 Alonzo Mourning (1999-00 MIA)1999-00 | 294 |