Joe Mazzulla Earns NBA Coach of the Year After Guiding Celtics Revival

Joe Mazzulla spent much of the 2025-26 NBA season insisting that the Coach of the Year award carried little meaning to him. Even as speculation grew around his candidacy, the Boston Celtics head coach repeatedly shifted attention toward his players and coaching staff rather than embracing individual recognition.

On Tuesday, the league officially announced that Mazzulla had been named NBA Coach of the Year, making him the fourth coach in Celtics history to receive the honor. The award capped another impressive season for Boston, which exceeded expectations despite major roster changes and significant injury setbacks.

Mazzulla’s accomplishment stood out because of the circumstances surrounding the Celtics entering the year. Boston began the season without Jayson Tatum for much of the schedule as the franchise star recovered from an Achilles injury. The team also moved on from key veterans Jrue Holiday and Kristaps Porzingis before the season began, creating uncertainty around the roster’s direction.

Instead of taking a step backward, the Celtics remained among the Eastern Conference’s elite. Boston finished the regular season with a 56-26 record, secured another Atlantic Division title, and established itself as one of the NBA’s most disciplined and balanced teams under Mazzulla’s leadership.

1. Celtics Surpass Expectations Amid Major Changes

Many observers expected Boston to experience a transitional season after the departures of established veterans and the absence of Tatum. Without several familiar pieces from recent playoff runs, questions surrounded whether the Celtics could remain contenders in the Eastern Conference. Mazzulla responded by reshaping the team’s identity around flexibility, defense, and player development. Jaylen Brown took on a larger offensive role throughout the season, becoming the focal point of the Celtics attack while Tatum worked through recovery. Brown’s expanded responsibilities became one of the defining storylines of Boston’s campaign. The Celtics coach also earned praise for trusting younger players in important situations. Neemias Queta, Baylor Scheierman, Hugo Gonzalez, and several developing contributors all saw increased opportunities during the season. Boston’s willingness to rely on emerging talent helped maintain consistency despite injuries and roster turnover. That growth allowed the Celtics to remain competitive night after night. Boston secured the second-best record in the Eastern Conference, trailing only the Detroit Pistons. Even with heightened expectations that come with the franchise’s history, the Celtics consistently found ways to win in a season many predicted would be more difficult.

2. Mazzulla Rejects Focus on Individual Recognition

While Mazzulla’s coaching work drew widespread attention throughout the season, he never appeared comfortable discussing the possibility of winning Coach of the Year. As media conversations intensified late in the regular season, the Celtics coach openly dismissed the significance of the award. Before a March matchup against the Atlanta Hawks, Mazzulla bluntly described the award as “stupid” and emphasized that coaching success should not be viewed as an individual accomplishment. He repeatedly pointed to the players and assistant coaches around him as the real reason for Boston’s success. Mazzulla’s comments reflected the personality he has displayed since taking over the Celtics. His direct communication style and intense sideline demeanor have often drawn comparisons to longtime San Antonio Spurs coach Gregg Popovich. Like Popovich during his early years, Mazzulla rarely softens his opinions when speaking publicly. Even after receiving the award, Mazzulla’s perspective likely remained unchanged. Throughout the season, he consistently praised the work ethic of Boston’s coaching staff and the sacrifices made by players adapting to new responsibilities. His approach reinforced the culture the Celtics built during a challenging season filled with outside doubt.

3. Respect Grows Around League for Celtics Coach

At just 37 years old, Mazzulla also entered the NBA record books with the achievement. He became the youngest head coach to win Coach of the Year since Phil Jackson earned the honor during the 1974-75 season. The recognition further strengthened Mazzulla’s standing as one of the league’s rising coaching figures. His success has come remarkably quickly. Now in his fourth season leading Boston, Mazzulla has already helped the franchise maintain consistent success despite constant pressure that surrounds one of the NBA’s most historic organizations. The Celtics have now captured five consecutive Atlantic Division titles during his tenure. Still, the season ended with disappointment for Boston. The Celtics were eliminated in the first round of the playoffs after losing Game 7 at home against the Philadelphia 76ers. The abrupt ending prevented the team from turning an impressive regular season into a deeper postseason run. Even so, league voters clearly valued the work Mazzulla accomplished over the course of the year. Detroit Pistons coach JB Bickerstaff finished second in the voting after guiding Detroit to the conference’s top seed, while San Antonio Spurs coach Mitch Johnson placed third following a 62-win season. For Mazzulla, the award served as recognition of a season in which Boston exceeded nearly every expectation despite adversity.