What happened: Boston Celtics head coach Joe Mazzulla has won the 2025-26 NBA Coach of the Year award, per a report from Shams Charania. The recognition caps Mazzulla's leadership of the Celtics through the 2025-26 campaign.

Why it matters: The award places Mazzulla among the league's most respected sideline minds and validates Boston's program under his direction. Coach of the Year honors typically reflect a team's standing and overall season trajectory, underscoring the Celtics' continued status as a contender.

What to watch: Watch for the Celtics' official acknowledgment and how Mazzulla frames the honor amid the team's ongoing postseason ambitions.