DALLAS — Jordan Bell caught a lob from JaVale McGee, took a dribble and, with one foot in the paint, tossed the ball off the backboard. While drawing contact, the rookie second-round pick hammered home the dunk, sending his All-Stars teammates on the bench into an uproar. In a game devoid of drama with 2:43 left, Bell was free to turn garbage time into the Drew League.