** FILE ** In this February 1988 file photo, Ron Garretson, left, listens as his father, veteran NBA referee Darell Garretson, talks to him before a basketball game between the Philadelphia 76ers and the Golden State Warriors in Philadelphia. It was the first time the two worked a game together. Darell Garretson, the longtime NBA referee who also directed the league's officiating staff, died Monday, April 21, 2008, in Mesa, Ariz., according to the NBA. He was 76. (AP Photo/Rusty Kennedy, File)