Tristan Thompson is on the move — the NBA star has reached an agreement to join the Boston Celtics, his agent Rich Paul of Clutch Sports confirmed to Yahoo Sports on Saturday, November 21.The outlet reports that the free agent, 29, who played with the Cleveland Cavaliers for nine seasons, has a two-year, $19 million deal with the Celtics.The center’s impending move to the East Coast comes after he reconciled with ex-girlfriend Khloé Kardashian and spent several months quarantining in L.A.