Brad Stevens has confirmed the Boston Celtics will retain Joe Mazzulla as head coach next season.

"He's a terrific leader," Stevens said. "He'll only get better at anything that he can learn from this year, because he's constantly trying to learn. And he's accountable."

Mazzulla guided the Celtics to a 57-25 record in his first season as head coach of the Celtics.

Mazzulla was elevated to the position when the Celtics suspended Ime Udoka for the season.