PULLMAN -Derrick Low scored 15 points and No. 17 Washington State relied on the Pac-10’s best defense to shut down Arizona State in a 59-47 victory Thursday night.

Aron Baynes and Taylor Rochestie both had 10 points and six rebounds for Washington State (21-5, 9-5), which won its fourth straight, the longest current streak in the conference. The Cougars swept the two-game series with Arizona State for the second straight season.