The Wildcats received 21 first-place votes. UCLA was chosen to finish second and Colorado third.
Arizona finished 27-8 last season and advanced to the NCAA tournament round of 16 before losing to Ohio State, and fifth-year coach Sean Miller has several experienced players returning this year.
Rounding out the order were defending Pac-12 tournament champion Oregon at fourth followed by California, Stanford, Arizona State, Washington, Utah, Oregon State, Southern California and Washington State.
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