They are still waiting for a second opinion after he suffered a torn tendon in his right thumb, but his chances of a return don't look great.
Smart reportedly plans to seek a second opinion from a hand specialist in NY.
Smart hit the floor often during the Celtics' Sunday night loss to IN, but one first half battle for the ball IN particular had a foreboding effect IN the form of a jammed thumb.
Fans around Boston got some troubling news on Monday when the team announced that Marcus Smart would be out indefinitely with a hand injury.
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The Celtics are still unsure whether Marcus Smart will be able to play again this season. Smart is now going over his treatment options with the Celtics medical staff, but with no clear timetable to return, he should be sent to the waiver wire in most cases.
That appears to be confirmed by this latest update, as the Celtics organization doesn't believe Irving's injury is anything overly serious.
If Smart is sidelined for an extended period of time (potentially into the playoffs), it would be a big hit to the Celtics.
Smart is averaging 10.2 points, 4.8 assists and 3.5 rebounds per game.