SAN JOSE, Calif. (AP) - Dee-Dee Wheeler added 15 points as the third-seeded Wildcats (22-7) extended their season high win streak to six games. Krista Warren had 14 points.
The Huskies had no answer for Polk, the 6-foot-5 freshman of the year in the conference. The Wildcats were able to consistently get the ball inside to her.
Washington, almost certain to receive a bid for the NCAA tournament, received a scare when an Arizona player inadvertently stepped on Giuliana Mendiola's left foot with 4:33 remaining. She was able to walk off the court under her own power and was attended to on the bench.
Mendiola, the conference player of the year, left the game with seven rebounds, nine assists and seven points.
Arizona, which has won nine of its last 10, shot 54 percent from the field while taking advantage of Washington's subpar shooting. The Huskies made just 20 of 62 shots (32 percent).
Washington and Arizona tied for second place during the regular season, and the Huskies were awarded the No. 2 seed based on their overall record.
Wheeler made a pair of free throws to give Arizona a 65-41 lead with 6:38 left to play.
The Wildcats shot 50 percent from the field in the first half, making 10 of their last 17 shots of the half.
Washington was just over 27 percent from the floor, missing its last 10 shots and committing six turnovers in the final eight minutes.
Emily Autrey's layup with 12:18 left in the first half finished off an 11-0 run by the Huskies, but Arizona outscored Washington 22-5 the rest of the way to take a 31-19 halftime lead.