Hayward and the Celtics reviewed his MRI results Wednesday before deciding on the procedure but a timetable for his recovery will not be known until after surgery, league sources told Yahoo Sports.
Hayward, 27, joined the Celtics this past offseason, signing a four-year, $128 million maximum contract. He was expected to form a championship contender alongside Kyrie Irving and Al Horford after spending his first seven seasons in Utah, where he made the All-Star team last year.
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