No. 21 Washington State men's basketball upset No. 4 Arizona by a final score of 77-74 on Thursday, Feb. 22 in Tucson. Jaylen Wells converted a go-ahead four-point play in the final moments to cap off a season-best 27-point performance to help lift the Cougars to first place in the Pac-12. The victory marks the longest conference winning streak (8) since 1946-47 for WSU.