FILE - In this Feb. 28, 2018, file photo, Boston Celtics guard Kyrie Irving (11) moves down court during the first quarter of an NBA basketball game in Boston. A person with knowledge of the situation says Celtics point guard Kyrie Irving will miss the rest of the regular season and playoffs after surgery on his left knee. The official spoke on the condition of anonymity to The Associated Press because the team has not released the news. (AP Photo/Charles Krupa)