Quade Green scored 15 of his career-best 26 points in the second half as Washington (1-4, 0-2) erased most of a 15-point deficit. RaeQuan Battle added 19 points, hitting 4 of 6 from 3-point range.
LJ Figueroa converted a three-point play to give Oregon a 15-point lead, its biggest of the game, with 16 minutes left.
Green scored Washington's first six points in an 8-2 run that trimmed its deficit to 69-68 with 1:40 to play but Williams hit an open 3-pointer from the left corner 24 seconds later. Battle converted a three-point play to make it 72-71 with 58 seconds remaining and the Huskies got a stop on the other end, but lost the ball out of bound and then fouled Chris Duarte who made 1 of 2 from the free-throw line and Washington called a timeout with 7.