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Brad Stevens Reveals Why Boston Celtics Signed Joe Mazzulla to Contract Extension

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John Tlumacki/The Boston Globe via Getty Images

The Boston Celtics signed head coach Joe Mazzulla to a multi-year contract extension and president of basketball operations Brad Stevens revealed why the big NBA move was made.

“We are very excited that Joe has agreed to extend with the Celtics,” Brad Stevens said. “He understands the job and has a passion for the Celtics that is only rivaled by our most die-hard fans. He’s worked hard and accomplished amazing things in his first three years as a head coach – including averaging over 60 wins per season and winning the 2024 NBA Championship. Joe is a gifted leader who brings a consistent commitment to learning, improving, and maximizing each day we get to compete for the Boston Celtics.”

Mazzulla guided the Celtics to the 2024 championship against the Dallas Mavericks in five games. He is 182-64 in the regular season and 33-17 in the playoffs with Boston.

“This is truly a blessing,” Joe Mazzulla said. “I would not be here without my faith, my wife, and my children. We are thankful for the partnership with our ownership groups, Brad’s mentorship, and the support of our staff. Most importantly, I am grateful for the players I have been able to coach the past three seasons. I look forward to competing for the Celtics and the city of Boston.”

The Celtics lost to the New York Knicks in the second round of the 2025 playoffs in six games. Jayson Tatum tore his right Achilles tendon in Game 4 at Madison Square Garden.

Boston traded Jrue Holiday to the Portland Trail Blazers and Kristaps Porziņģis to the Atlanta Hawks this offseason to save money. The Celtics acquired Anfernee Simons from the Trail Blazers and Georges Niang from the Hawks.

Stevens then traded Niang to the Utah Jazz for RJ Luis Jr. He also signed Chris Boucher, Luka Garza and Josh Minott.

Al Horford won’t be re-signed by the Celtics, while Luke Kornet left Boston for the San Antonio Spurs.

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Ashish Mathur
Ashish Mathur is an NBA and WNBA writer for DallasHoopsJournal.com. He has covered the NBA since 2015 for ClutchPoints, Sportscasting, Heavy Sports, NBA Analysis Network, Fadeaway World, Hoops Wire and Athlon Sports and the WNBA since 2025 for Athlon Sports and DallasHoopsJournal.com. You can follow Ashish on X @amathur25.