Pierce scored six of his points in the extra frame and added eight assists to go with seven rebounds as the Celtics won for only the second time in six road games.
Lee finished with 14 points while Avery Bradley added 18.
The Jazz, meanwhile, suffered a rare home loss, falling to 21-7 on their home court as Randy Foye's last-gasp 3-point try fell short at the buzzer.
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