Arnold Jacob "Red" Auerbach was a legendary American professional basketball coach and executive. He served as the head coach of the Boston Celtics from 1950 to 1966, leading them to nine NBA championships, including an unprecedented eight consecutive titles. After retiring from coaching, he continued as the Celtics' general manager and president, winning seven more championships as an executive. Known for his competitive spirit and lighting a victory cigar before the final buzzer, Auerbach is widely regarded as one of the greatest coaches in sports history.