No school in the Pac-12 has been tougher on Dana Altman than California.

The Golden Bears have beaten a ranked Oregon team four times in the past four years as they prepare to visit the 11th-ranked Ducks at 6 p.m. Thursday at Matthew Knight Arena.

Oregon (16-2, 5-0) will match the school record with its 15th straight win if it can avoid another upset against the unranked Bears.

�They are a tough out because of their talent,� said Altman, who went 2-8 against Cal in his first six seasons at Oregon. �They have two guys in Ivan Rabb and Jabari Bird that everybody in the country wanted. They are talented and well-coached and we will have to play awfully well.�

Oregon was also ranked No. 11 last year when it lost 83-63 at California. Three years ago, the Bears beat the 17th-ranked Ducks 96-83 at Matthew Knight Arena.

In 2012-13, Oregon was ranked heading into both match-ups with California when it was swept by the Bears.

�Cal has had a lot of success here, so we have got our work cut out for us,� Altman said. �I hope our guys are ready because we will definitely have our hands full.�

California (13-5, 4-2) has won three straight games to move into fourth place in the Pac-12. Its two conference losses came against No. 3 UCLA and No. 14 Arizona while its only other loss in the past six weeks was against No. 16 Virginia.

�They are a tough match-up for a lot of people,� Altman said. �You look at their losses by four points to Virginia and five against Arizona.�

Rabb, a 6-foot-11 sophomore, is averaging 15.6 points and a conference-best 11.1 rebounds, and has boosted those totals to 17.3 points and 14.2 rebounds in conference games.

California leads the conference with 40.8 rebounds per game, nearly eight more than its opponents.

�Rabb is a good offensive rebounder, so we are going to have to focus on blocking out and playing defense,� Oregon senior center Chris Boucher said. �We know they get offensive rebounds, so we need to focus on that and try to stop them.�

Seven-footer Kingsley Okoroh averages 6.8 rebounds and 2.7 blocks per game while 7-1 Kameron Rooks gets 5.4 rebounds off the bench.

�They have got two real big bodies in there with Rabb as the third,� Altman said. �They can play really big but they have played small some so they have a lot of versatility with their lineups.�

Bird, a 6-6 senior who averages 13.4 points per game, went scoreless in his only previous appearance at Matthew Knight Arena last season. In two games against Oregon at Cal, he combined to shoot 18-for-34 from the field, including 9-for-17 on three-pointers, for a total of 46 points.

�He can be deadly and he got hot on us at their house last year,� Oregon guard Tyler Dorsey said. �He is a streaky shooter so we can�t let him get going.�

Oregon is tied for first place in the conference with Arizona after winning 14 games in a row while going more than eight weeks without a loss. The school record of 15 straight wins was set in 1913.

�We haven�t talked much about that, we talk about what it will take each and every game,� Altman said. �It is just kind of there. Guys are aware of it, I�m sure, but we don�t dwell on it or spend a lot of time on it.�

Oregon, which has won 36 in a row at home, could break the school record for longest winning streak if it sweeps Cal and Stanford this week.

�No pressure at all,� Dorsey said of the streaks. �We know we have a winning streak, but we don�t pay any mind to it. We definitely want to keep that streak alive though.�

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