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Cal suffered its worst Pac-12 loss in 13 years, losing 99-60 to No. 5 Arizona (27-3, 15-2), which locked up the outright Pac-12 title at McKale Center.
The Bears (17-13, 7-10) trailed 48-27 at halftime and never threatened an Arizona home win streak that reached 37 games.
Cal shot 38.1 percent, turned the ball over 16 times and was outrebounded 42-34.
Cal hadn’t been beaten by a wider margin in a conference game since a 99-53 loss at Arizona in 2002.
“You’ve got to compete, compete start to finish,” said Cal coach Cuonzo Martin. “If shots don’t fall, don’t put your head down.”
Cal closes the Pac-12 regular season Saturday at Arizona State, which handed the Bears a decisive 79-44 in Berkeley on Jan. 22.
Tyrone Wallace led the Bears with 16 points, but had just two until the final 2 minutes of the first half, by which time Arizona led 43-24. Reserve guard Sam Singer scored 13 points while David Kravish and Jabari Bird had 10 points each. Christian Behrens had 10 rebounds.
East Bay product Brandon Ashley equaled his career high with 21 points for Arizona, which had six players in double figures and shot 57 percent.