The game was Harden's sixth out of his last seventh with at least 24 points.
Harden also contributed five rebounds and five assists in the loss.
Bradley scored 15 of his 30 points in the third quarter and led the Celtics with eight rebounds in the victory.
Martin, who is averaging 20.2 points and 3.8 rebounds per game, has missed the last four games with the injury. The Timberwolves are currently 7 1/2-point underdogs.
Zeller, who is averaging 7.6 points and 5.8 rebounds per game, has missed nine of the last 10 games for Charlotte with the injury. Jeff Taylor and Marvin Williams will continue to see more time in the lineup