The Boston Celtics have confirmed a multi-year contract extension for head coach Joe Mazzulla. This decision aims to bring stability to the team, which has seen significant changes in its roster recently. Although the terms of the contract remain undisclosed, Mazzulla's impressive record speaks volumes. In his three seasons with the Celtics, he has achieved an 182-64 regular-season record and a 33-17 playoff record.
Mazzulla's achievements include leading the Celtics to an NBA championship in the 2023-24 season. His 182 wins rank him third among NBA coaches in their first three seasons, trailing only Steve Kerr and Phil Jackson. "We are very excited that Joe has agreed to extend with the Celtics," said Brad Stevens, President of Basketball Operations. "He understands the job and has a passion for the Celtics that is only rivalled by our most die-hard fans."

Mazzulla initially took over as interim head coach before the 2022-23 season after Ime Udoka was suspended for violating team rules. During that season, he led Boston to a 57-25 record and reached the Eastern Conference finals, where they lost to Miami Heat in seven games. His performance earned him a full-time position by February of his debut season.
Under Mazzulla's leadership, Boston excelled in his second season, winning 64 regular-season games and securing their first NBA title since 2008 by defeating Dallas Mavericks in five games during the 2024 Finals. The following season saw them achieve a 61-21 record but fall short against New York Knicks in the East semi-finals after Jayson Tatum's injury.
Mazzulla faces significant challenges in the upcoming 2025-26 season. With Tatum expected to miss most of it due to injury, Boston also parted ways with key veterans Kristaps Porzingis and Jrue Holiday this summer. Holiday was traded to Portland Trail Blazers for Anfernee Simons, while Porzingis moved to Atlanta Hawks to manage luxury tax expenses.
Two other important players are absent from this year's roster: Luke Kornet joined San Antonio Spurs in July, and Al Horford remains a free agent at age 39. Despite these challenges, Mazzulla remains optimistic about competing for both the Celtics and Boston city.
"This is truly a blessing," expressed Mazzulla. "I would not be here without my faith, my wife, and my children. We are thankful for our ownership groups' partnership, Brad's mentorship, and our staff's support." He added gratitude towards players he coached over three seasons.
Mazzulla spent three years as an assistant coach with the Celtics before taking on his current role as head coach. His commitment to learning and improving has been evident throughout his tenure with Boston.