DALLAS — Early in the third quarter of Saturday night’s game between the Dallas Mavericks and the Milwaukee Bucks, Mavericks Coach Rick Carlisle had seen enough. Consecutive possessions resulted in his rookie point guard, Dennis Smith Jr., trying to force things, first dribbling his way into a contested, low-percentage look in the lane that missed, then picking up his dribble and lobbing a pass that was snatched away by the never-ending reach of Bucks star Giannis Antetokounmpo. Carlisle immediately wheeled around and signaled to the bench for veteran J.J.