Xavier Tillman faces a crossroads season with Boston, needing to stay healthy and offer a real three-point threat to win a steady backup role behind the frontcourt. His defense remains elite on switches and in forcing turnovers, but his offensive game lacks a credible spacer or ball-handler, keeping him on the fringe when the Celtics rotate bigs.

With Horford, Kornet and Porzingis out of the mix, a clearer path should exist if Tillman can stay durable and develop a league-average jumper. This season may define whether he can become a functional two-way big or drift into limited backup minutes elsewhere.