What happened: The Celtics are spotlighting offseason preparation, framing the work being done by the player wearing No. 20 as the team builds toward the 2026-27 campaign. Boston is emphasizing development and conditioning during the league's quiet stretch.

Why it matters: Offseason progress sets the tone for a Celtics roster expected to stay in the Eastern Conference mix. How role players sharpen their games over the summer often shapes the rotation and depth once camp opens.

What to watch: Watch for how the No. 20 figures into Boston's rotation plans as training camp and the 2026-27 season approach.