The loss, just the second in the conference for the Wildcats, dropped UA to 31-8 on the year and to 9-2 in Pac-10 play.
The lack of offensive production handed
After jumping out to a 1-0 lead in the third on a double by Jon Gaston and a sacrifice fly by Robert Abel,
Meanwhile the Cougar offense struck for three runs on four hits off of Mills in the fourth to take a two-run lead. DH Mike Gilbert delivered the big blow with a two-run single to left to hand WSU the lead and Zach Borba added another run-scoring single in the frame to stake the Cougs to a 3-1 edge.
Gilbert added to his productive day in the sixth, hitting what would prove to be a much-needed solo homer off Mills to push the advantage to 4-1.
The Cats repeated their third inning scoring effort in the eighth when Bill Rhinehart doubled and came around to score on a sacrifice fly by Kevin Rodland to make it 4-2 WSU.
Colt Sedbrook pulled the Cats within one with a one-out solo homer in the ninth, but closer Ross Humes sandwiched strikeouts of C.J. Ziegler and Rhinehart around an infield single by Brad Glenn to finish off the win.
Ison (4-5) picked up the win after allowing just two runs on two hits in 7 1/3 innings of work. He finished with three strikeouts and just one walk on the afternoon. Humes tallied his seventh save of the year with 1 2/3 relief innings.
Mills (8-3) was charged with his third loss of the season despite allowing just four runs on six hits over seven innings on the mound. He struck out seven and walked only one in the loss.