While the Celtics appear committed to building around Brown and Tatum, speculation about Brown’s availability has notably increased around the league. It is an ongoing topic of conversation among sources familiar with both players. Moving Brown would appear highly unlikely until after this season and seems more plausible ahead of 2022-23. But as long as Boston floats on the periphery of the Eastern Conference playoff picture, league personnel will monitor Brown’s status and if the Celtics inch closer toward pivoting in a new direction.