Berkeley, Calif. ? Amit Tamir told himself not to think about the 39 points he scored against Oregon last season.

He couldn’t help it, though — things were going so well again.

Tamir scored 25 points and Joe Shipp added 22 points and eight rebounds to lead California to its third straight win, an 88-72 upset over the No. 12 Ducks on Thursday night.

“Somehow it just happens that I feel pretty comfortable against Oregon,” Tamir said.

Brian Wethers added 16 points for the Golden Bears (9-2, 2-0 Pac-10), who won at home for the 12th straight time.

Luke Jackson had 17 points, eight assists and five rebounds for Oregon. The Pac-10’s top scoring team had only 38 points with 14:54 left, and the Ducks have been averaging nearly 90 per game. They had been doing just about everything right coming into this game.

“They just got on a roll and we kind of came out and played sloppy right off the bat,” Jackson said. “We didn’t get a lot of rhythm shots. We rushed things.”

Oregon (10-3, 1-2) leads the conference in scoring, field-goal percentage and 3-point percentage, as well as free-throw percentage, steals and assists. Even assist-to-turnover ratio.

But the Ducks never got in sync against the aggressive and up-tempo Bears, who couldn’t seem to miss when it mattered most. Oregon was sloppy with the ball to fall behind early, and its top players struggled to score all game. The Ducks often rushed their shots as the 35-second clock was winding down.

At least four players had scored in double figures in all but two of the team’s previous 12 games this season. The Ducks had three this game, with Luke Ridnour and Andre Joseph adding 14 and 12 points, respectively.

Ohio State's Matt Sylvester (40) fouls Michigan State's Alan Anderson during the second half of Thursday's game in East Lansing, Mich. Anderson, who chose MSU over Kansas in recruiting, had 18 points in Michigan State's 66-55 victory.

“They did a great job defensively knocking us out of sync for this game,” Oregon coach Ernie Kent said. “We never had an opportunity to gain momentum.”

Cal built on its 10-point halftime lead with an impressive start in the second half. The Bears started the half with an 8-3 run and had an answer whenever the Ducks made a threat.

Tamir and Shipp combined to shoot 5-for-10 from 3-point range and Cal was 53 percent from the field to Oregon’s 44 percent.

The Ducks will have to try to regroup and save their ranking Saturday at Stanford.

Cal and Oregon split their series last season, with both games being decided by four points. One of those was a 107-103 win in double-overtime, when Tamir scored 39.

Earlier this season, Kansas University defeated Cal, 80-67, in Oakland. The Jayhawks lost to Oregon, 84-78, in Portland.

No. 25 Michigan St. 66, Ohio State 55

East Lansing, Mich. — Alan Anderson scored a career-high 18 points and Maurice Ager had a career-best 15.

Ohio State held Chris Hill, the Spartans’ leading scorer, without a point for over a half and to four points total, 12 below his average.

“We were going to make somebody else beat us,” Buckeyes coach Jim O’Brien said.

Michigan State made its first 26 free throws and missed only one of 30.

The Spartans (9-4) didn’t lead until early in the second half, but they put away the injury-plagued Buckeyes with a 12-3 run after leading by four with 8:46 left. Ohio State (7-5) has lost all five games against ranked opponents.

No. 2 Arizona 82, Washington St. 69

Tucson, Ariz. — Jason Gardner scored 19 points to lead four Arizona players in double figures but the No. 2 Wildcats struggled much of the night before beating Washington State for the 35th consecutive time.

Luke Walton, back after missing last week’s Oregon trip because of his fourth sprained ankle of the season, had nine points and eight assists but five turnovers. Channing Frye scored 11 and grabbed a season-high 13 rebounds for the Wildcats (10-1, 3-0 Pac-10). Salim Stoudamire added 14 and Rick Anderson 13 points for the Arizona, which overcame 21 turnovers.

Marcus Moore, the Pac-10’s leading scorer, scored 35 points, including 8-for-12 3-pointers for the Cougars (5-7, 0-3) despite bone chips in his right ankle. The junior guard topped 1,000 points for his career with 1,005.