Not with a bang, but with a re-aggravation of a right femoral-acetabular impingement with labral tear.
To those of us without a medical degree, that's a hip strain and labrum tear, which is how the King in the Fourth ends his season; the Boston Celtics announced this afternoon that Isaiah Thomas' season would end after aggravating the injury in last night's demolition at the hands of the defending NBA champion Cleveland Cavaliers. Thomas, who initially strained the hip in Game Six of the Washington Wizards series, had been playing noticeably worse in the last several games, though the existence and severity of the injury wasn't revealed until last night at halftime, when the hobbled point guard was unable to return.