Boston Celtics first-round draft pick Robert Williams, who had already overslept an introductory conference call the day after the draft, missed a flight to Boston and was not present for the start of the team's summer league practices on Sunday.
Concerns about Williams' work ethic contributed to him sliding out of the lottery and to Boston at No. 27 in last month's draft. The Celtics introduced the 20-year-old big man at a news conference Friday morning but he did not get back to town in time for Sunday's afternoon workout.