O.J. Mayo and Darren Collison combined for 40 points and willed their team back into the game, but it was too little and too late. A costly turnover with five seconds left in the 2nd OT would finish the Mavs' hopes to victory.
Paul Pierce lead the Celtics with 34 points and Rajon Rondo contributed with a huge 16-9-15 stat line.
Here is CLNS Radio's Jared Weiss with Three at The Buzzer.
Filmed and produced by Lucas Parolin of CLNS Radio.