Jahii Carson added 14 points and Shaquielle McKissic 12 for the Sun Devils (12-3, 1-1 Pac-12), who were coming off a 76-65 home loss to Washington in their conference opener.
DaVonte Lacy, Washington State's leading scorer for the season, was back in the lineup eight days after an emergency appendectomy but left with 6:23 to go in the first half and did not return.
Freshman Que Johnson scored 18 for Washington State.
The Cougars (7-7, 0-2) shot 34 percent three days after their worst offensive showing in 76 years in a 60-25 loss to top-ranked Arizona Thursday night.
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