What happened: The Boston Celtics marked the birthday of head coach Joe Mazzulla with a celebratory message to fans. Mazzulla has guided the franchise from the sideline since taking over the lead role, including the run to the 2024 NBA title.

Why it matters: Mazzulla remains the central figure shaping Boston's direction as the club moves toward the 2026-27 season. Continuity on the bench matters as the front office sorts through roster decisions this offseason.

What to watch: Attention turns to how Boston rounds out its roster during the offseason and what the staff prioritizes entering the new campaign.