The NBA record for blocked shots in a season and block shots per game was set in the 1984-85 season by Mark Eaton of the Utah Jazz. That season, the 7-foot-3 Eaton blocked 456 shots in 82 games. That is 5.6 blocks per game. Hakeem Olajuwon was second in the league that season with 220 blocks and 2.7 blocks per game for the Houston Rockets.
7-foot-6 Manute Bol has the second most blocks in an NBA season with 397. He did it for the Washington Bullets the season after Eaton set the record. Artis Gilmore blocked 422 shots in the 1971-72 ABA season, where he played 84 games for the Kentucky Colonels.