A bursa is a closed, fluid-filled sac that functions as a cushion and provide a gliding surface to reduce friction between tissues of the body around joints. Essentially, a bursa provides a slick surface so that tendons and ligaments can slide across a bony prominence so it doesn't catch or rub against the bone.
Mark Tatum's appointment as NBA Deputy Commissioner is recognition of the confidence our owners and teams have in his leadership ability and track record of success, said Silver.
Her first taste of NBA action as a referee came during an Atlanta Hawks/Miami Heat game when LeBron James was still with the Heat. Holtkamp was a non-staff official at the time, and was still refereeing in the D-League. Non-staff officials in the NBA work preseason and regular season games for development, with a chance to be selected to referee NBA games. It was really exciting, and there were moments it was overwhelming.