A statistic awarded to a defensive player who deflects an offensive player's field goal attempt, preventing it from going in the basket. The defensive player has to touch the ball while it is travelling upwards or at its apex and before the ball touches the backboard or the rim. Otherwise, the defensive player commits a goaltending violation and the offensive is awarded the points. It may also be referred to as a "blocked shot".
Former Houston Rockets center Hakeem Olajuwon holds the NBA record for most career blocks with 3,830. However, because the NBA only started recording blocked shots during the 1973-1974 season, there's no statistical proof of the shot-blocking ability of the players that existed before that season. Many believe that former Boston Celtics center Bill Russell is actually the record holder for most career blocks.