Key Takeaways

• Joe Mazzulla has signed a multiyear contract extension with the Boston Celtics
• Mazzulla owns a 182-64 regular season record (.740 winning percentage) and 33-17 playoff record in three seasons
• The 37-year-old coach led Boston to the 2024 NBA Championship and has averaged over 60 wins per season
• The upcoming 2025-26 season will be challenging as Jayson Tatum is expected to miss most of the year with a torn Achilles

The Boston Celtics have secured their head coach for the foreseeable future, announcing Friday that Joe Mazzulla has signed a multi-year contract extension. The exact terms and length of the deal were not disclosed per team policy.

Mazzulla, who became the 19th head coach in Celtics franchise history in February 2023, has compiled remarkable results in his first three seasons. The Rhode Island native coached the Celtics to an NBA championship in 2024, becoming the youngest NBA head coach to win a title since Bill Russell led the 1968-69 Celtics. His championship team posted a 16-3 postseason record, the second-highest playoff winning percentage in the NBA since the first round expanded to best-of-seven in 2002-03.

Mazzulla was unexpectedly thrust into the head coaching role ahead of the 2022/23 season when Ime Udoka was suspended by the club. He initially served as interim coach before having the tag lifted and receiving his first extension in February 2023. The coach finished third in Coach of the Year voting in his first season and fourth in his second.

The extension comes as the Celtics face significant roster changes heading into 2025-26. With Jrue Holiday and Kristaps Porzingis no longer on the roster and Jayson Tatum expected to miss most or all of the season while recovering from a torn Achilles, Mazzulla will need to maximize a group with less talent than his previous championship teams.