"The person that is going to benefit the most from this, and it's fine, to step up, is Justise Winslow," Riley said. "He's capable of starting in this league and that is right now who we have slotted in there. And I feel very comfortable with it."

Winslow, who is poised to begin workouts Monday with the U.S. Select Team to help prepare the Olympic team for the Rio Games, said, even at 20, he embraces greater responsibility in the wake of the departures of Deng, Johnson and Dwyane Wade.