Boston Celtics' Joe Mazzulla named NBA Coach of the Year
Boston Celtics head coach Joe Mazzulla has won the 2025-26 NBA Coach of the Year award, ESPN NBA reports. At 36, Mazzulla is among the youngest coaches ever to receive the honour, and is reported to have secured a majority of the media-jury vote in the awards balloting.
Mazzulla was appointed first as interim head coach, then permanently in 2022 following Ime Udoka's departure from the club. In his first season in the role, he led the team to an NBA championship and has kept the Celtics consistently in the title conversation in the seasons since.
The Celtics' regular-season success in 2025-26 is widely attributed to Mazzulla's deepened rotation approach and the tactical changes he introduced to the team's defensive system. Boston's season-long defensive rating ranked among the top three in the league — a factor cited as decisive in the bulk of the team's wins.
Mazzulla reportedly outpolled Cleveland Cavaliers head coach Kenny Atkinson and the Detroit Pistons head coach in the voting. Detailed vote distributions — first, second and third place tallies — appear in the NBA's official disclosure; the media jury is composed of 100 voters.
A former head coach at Glenville State University earlier in his career, Mazzulla joined the NBA as an assistant on Brad Stevens's bench. He moved to the Celtics scouting staff in 2019, then rose to assistant coach — a gradual development arc within the same club. Regardless of his age, his is described as one of the fastest-rising coaching trajectories in the NBA.
At the heart of Mazzulla's coaching philosophy is granting his players substantial autonomy. His communication with the team's two star figures, Jayson Tatum and Jaylen Brown, has frequently been reported as containing a strong relational element; he is said to give each player a 'game-plan ownership' role. This approach is considered a defining factor in maintaining team chemistry.
The Celtics' front office has announced that Mazzulla will sign a new contract extension ahead of the 2026-27 season, though details — length, salary — have not yet been made public. In a brief written statement following the award announcement, general manager Brad Stevens said Mazzulla's 'feel for the game and connection with his players' had been justly recognised.
With NBA playoff series continuing, the impact of the award on the team's motivation is a matter of discussion. Boston is preparing for a possible Eastern Conference semifinal or final matchup; whether the award timing distracts from the team's focus is among the management questions the coaching staff faces.
When the historical record of Coach of the Year winners is reviewed, the rate at which the winning coach claims the NBA title in the same season is relatively low — a statistic showing that the majority of winners do not reach the Finals. This pattern, sometimes dubbed the 'award curse' by Celtics fans on social media, is being discussed online.
Mazzulla's award should be read as part of the Celtics' broader coach-roster stability of the past several seasons. With Brad Stevens having moved to a general-manager role, the club has been able to make player-roster decisions within a longer-term vision. This article does not constitute team-management or sports-finance advice; award details and team-performance figures are based on ESPN NBA's reporting and the NBA's official disclosures.