The Dons (18-11, 8-7 WCC) knocked off defending WCC champion Gonzaga for the third consecutive year with the help of Perris Blackwell, who notched a double-double with 14 points and 10 rebounds.
Michael Williams added 13 points and Angelo Caloiaro chipped in with 10 for the victors.
Gonzaga (21-5, 11-3) couldn't keep its four-game winning streak going despite a game-high 21 points and 11 rebounds from Elias Harris.
Gary Bell Jr. contributed 16 points in the loss.
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