The triumph came a day after the release of a Sports Illustrated report that painted a picture of disarray, detailing a lack of discipline and declining moral at the once-storied program.
Brock Motum scored 18 as the only player in double-figures for Washington State (14-15, 6-11).
The Bruins played inspired, particularly on the defensive end, scoring 22 points off turnovers and holding the Cougars to 38.1 percent shooting.
UCLA won for the seventh straight time in the series.
Rebels' McPhee-McCuin, Davis excited for hoops season
The Ole Miss men's and women's basketball coaches join The Paul Finebaum Show to share their excitement about the upcoming season and what fans can expect.
Congress allows Ivy League antitrust exemption to expire
Congress allowed another layer of legal antitrust protection related to college athletics in the Ivy League to expire on Friday.
USC freshman center Vincent Iwuchukwu says he suffered cardiac arrest this summer but is 'feeling great'
USC freshman center Vincent Iwuchukwu says he suffered cardiac arrest during a workout but is "feeling great."