He completed the triple double with 1:40 to play when he assisted on Delaire's dunk.
Williams was a force from the opening tip, blocking Washington's first shot, grabbing the defensive rebound of Washington's second shot and passing to Spencer Jones for a layup that started a 12-0 run for Stanford (7-3, 3-1 Pacific- 12) to open the game.
The Huskies (1-8, 0-4) came within 14-5 on a Quade Green 3-pointer but that lasted for 18 seconds before Brandon Angel dropped in an answering 3 and the Cardinal lead never dipped under double digits again.
Oscar da Silva scored 17 points with 10 rebounds for his second straight double double, Jones scored 18 points with four 3-pointers.