"Miller and guard Ray Allen are expected to be the Celtics’ two top priorities in summer free agency following the retirement of Rasheed Wallace and a knee injury to Kendrick Perkins. ... Rivers has been behaving like a coach who plans to return. He participated in the Celtics’ draft preparation, and he had been working with GM Danny Ainge to prepare for the start of free agency on Thursday. He has also had conversations with prospective candidates to replace Tom Thibodeau on his coaching staff, but that hire is on hold." well, Bulls-Celtics rivalry, anyone? I guess.