"[The Celtics] have an identity this year -- or things that they've felt that has clicked for them and it's been successful, right?” Tatum told The Pivot. "The mindset has been relatively consistent (and) where it has been the entire season," Mazzulla said. Mazzulla noted Tatum is "progressing naturally" and that there's been "zero setback" in his rehab from a physical perspective. As Mazzulla suggested, it's natural for Tatum to have doubts and second-guesses as he recovers from the only major injury he's suffered in his NBA career. But Mazzulla certainly didn't close the door on his star player returning this season if he's healthy enough to do so.