Al Horford turned back the clock in his return from a two-game absence with a concussion.
Horford scored 21 points on 8-of-9 shooting to help the Boston Celtics hang on to beat the Toronto Raptors 95-94 on Sunday for their 12th straight victory.
"He's playing young again," teammate Terry Rozier said.
Horford had 15 points, 10 rebounds and nine assists against his former team in Atlanta on Monday night, the same day an elbow to the head from Kent Bazemore sent him into the NBA's concussion protocol. Horford also missed nine games last season with a concussion.
Horford disagreed with Rozier's assessment, thinking he's playing even better.