Boston Celtics guard Marcus Smart has suffered a torn tendon in his right thumb, league sources tell Yahoo. He will have second opinions on his thumb and be out indefinitely.
— Shams Charania (@ShamsCharania) March 12, 2018
Over 54 games, Smart has averaged 10.2 points, 4.8 assists, and 3.5 rebounds this season. Boston currently holds the No. 2 seed in the East with a 46-21 record.