Arizona rushed for 116 yards and controlled the time of possession 35:27 to 24:33.
Chris Henry ran for 94 yards on 35 carries and a pair of scores. Most importantly, he picked up tough yards in the fourth quarter when Arizona needed to run out the clock.
The Arizona defense played one of their best games of the year as well. They held the Cougars to just 45 yards rushing and limited them to just one long scoring drive.
Arizona was conservative on their first two plays, but then opened it up on third and long and the move paid off. Tuitama hit Anthony Johnson on a post pattern and the junior receiver raced 78 yards for the 7-0 lead. The Cougars notted things up at 7 two possessions later. After Nick Folk pinned the Cougars deep in their own territory, but Alex Brink went deep after Michael Johnson misjudged the ball, the Cougars had a 91-yard touchdown.
WSU kicked a field goal after a Tuitama pick but the Wildcats scored on the ensuing drive when the marched 80 yards and capped things off with a three-yard Chris Henry dive.
Arizona added two second quarter field goals and went into the half with a 20-10 lead.
WSU took the second half kickoff and marched 77 yards in nine plays and capped things off when Jed Collins rushed for a one-yard score.
They would not score again.
Arizona took advantage of a WSU gamble when the Cougars tried a fake punt. The Wildcats stopped them and took over at the Arizona 48. The Cats went back to their ball control offense and took over 4:00 off the clock before Henry ran six yards for the final score of the game.