Horford activated for Game 4

BOSTON -- With the Hawks facing what amounts to a must-win situation in Sunday's Game 4 of an Eastern Conference quarterfinal series against the Celtics, Al Horford has been activated and the team considers him a game-time decision.

Horford tore his left pectoral muscle on Jan. 11 in Indiana and was not expected to be back for this series, but with Atlanta's season hanging in the balance, it appears he's going to try to give it a go off the bench.

Josh Smith, who missed Game 3 with a left knee injury, is back in the starting lineup in Game 4 for the Hawks.

Zaza Pachulia and Jerry Stackhouse are the inactives for Atlanta.