Boston Celtics

Mazzulla joins Bill Russell in NBA history books as Celtics win title

Mazzulla is one of the youngest coaches ever to win an NBA championship.

NBC Universal, Inc.

By leading the Boston Celtics to an NBA-leading 18th championship, head coach Joe Mazzulla etched his name into the league's history books.

Mazzulla, 35, is the fifth-youngest head coach to win a championship since the BAA merged with the NBL to become the NBA in 1950. He is the youngest since the legendary Bill Russell, who won the title as a 34-year-old player-coach in 1968.

Mazzulla accomplished the feat in just his second season as a head coach. The Rhode Island native unexpectedly was called upon to replace Ime Udoka as Boston's interim coach to start the 2022-23 campaign. On Feb. 16, 2023, he was officially hired as the 19th head coach in Celtics history.

The Celtics have gone 121-43 in the regular season with Mazzulla leading the charge, including a league-best 64-18 record in the 2023-24 campaign. They're 27-12 under Mazzulla in the playoffs after going 16-3 during their championship run.

Mazzulla is younger than a number of active NBA players, including one of his own in veteran big man Al Horford (38). He'll turn 36 on June 30.

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