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Colorado senior forward Austin Dufault and freshman guard Spencer Dinwiddie each scored 15 points, 6-foot-7 sophomore forward Andre Roberson grabbed 15 rebounds and the Buffaloes beat California 70-57 on Sunday, dealing a blow to the Bears' Pac-12 regular-season title aspirations.

Cal (23-7, 13-4 in Pac-12) entered the day tied with Washington for the top spot in the league. The Huskies have two games remaining on the road against USC (6-23, 1-15) and UCLA (16-13, 9-7), while the Bears finish the season at Stanford (19-10, 9-8) next Sunday.

The Buffaloes (19-9, 11-5) remain in the running to receive one of four automatic byes at the conference tournament. Furthermore, they kept their flickering hopes afloat for their first league crown since capturing the 1968-69 Big Eight title. Colorado has to win at Oregon and Oregon State -- then receive major help.

Senior Cal guard Jorge Gutierrez was completely stifled by the Buffaloes, who held him to zero points on 0-for-7 shooting from the field and 0-for-3 from three-point range. Gutierrez did pull down nine rebounds and dish out two assists, but . The last time Gutierrez was held scoreless was on Jan. 2, 2010 in a win over the Cardinal.

As a team, the Bears once again suffered a poor shooting game against the Buffaloes, hitting 19 of 50 shots from the floor (38.0 percent), just a shade better than their 35.1-percent night in a 57-50 win over Colorado back on Jan. 12. The Buffaloes, on the other hand, greatly improved their shooting from the previous encounter, hitting 27 of 62 shots (43.5 percent) after shooting a dismal 31.9 percent back in January.

Cal did receive a 16-point contribution from sophomore wing Allen Crabbe and 15 from sophomore point guard Justin Cobbs, but nevertheless had their six-game winning streak snapped. The Bears have not won in Boulder since Dec. 16, 1974.