On July 6th, 2018 Boston Celtics rookie Robert Williams had a knee to knee collision in the first game of the Summer League. Williams left the game and did not return.

The diagnosis was a bone bruise (contusion).  We’ve all had bruises before. This is just one that goes deeper than the skin and muscle and down to the bone. This is the reason that the knee is sore. A bone contusion requires significantly less sideline time than a ligament injury or fracture.

There is no timeline for Robert Williams’ return.  The leg is structurally sound and people usually return to play when they are comfortable enough to be effective.

This blog was written by Paul Bonilla and David Ring.