Delon Wright scored 15 points as No. 11
Dallin Bachynski finished with 13 points, while Jordan Loveridge chipped in 12 and Brekkott Chapman added 12 for the Utes (19-4, 9-2
Anthony Brown led Stanford (16-8, 7-5) with 15 points, and Marcus Allen scored a career-high 13.
Utah closed the first half with a 6-0 run, including two buzzer-beating baskets from Bachynski, to take a 33-27 lead into halftime. Stanford led 10-4 out of the gate with the help of four offensive rebounds, but Utah responded with a 17-5 run sparked by eight straight points from Chapman.
California 68, at
Tyrone Wallace's five-foot jumper with 21 seconds left put Cal ahead 65-61 after the Buffaloes had used a 13-5 run to pull within two. Sam Singer then stole the ball at midcourt from Askia Booker, and David Kravish was fouled and sank two free throws to seal it.
Mathews hit five three-pointers as the Golden Bears (16-9, 6-6 Pac-12) ended a six-game skid in Boulder, where they last won on Dec. 16, 1974.