Cooper, a 6-4, 265-pound defensive end out of Tacoma's Wilson High, has signed his letter of intent to Washington State, the school said in a release today.
Cooper would appear ticketed for the inside of the Wazzu d-line.
"Xavier will bring a level of athleticism to our defensive line. He has a great deal of potential and as he develops in the weight room, he is going to help us on the defensive line," said Wulff.
A first team all-league and all-city selection this past season out of the rough and tumble Narrows League, Cooper posted 85 tackles as a senior, including 11 sacks.
Cougars add Tacoma d-lineman to 2010 class
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