Brittany Boyd had 10 points and 11 rebounds and No. 6 Cal pulled away from Oregon State in the second half Friday night for a 60-38 win.
Gennifer Brandon, coming back from a one-game absence due to an ankle injury, added 11 points and nine rebounds for the Golden Bears (18-2, 8-1 Pac-12).
Ali Gibson had 13 points and six rebounds to lead Oregon State (9-12, 3-6).
Cal led by 13 at halftime then put the game away with a 10-0 second-half run to go up 45-20. Oregon State got no closer than 16 from there.
Cal shot 24 of 60 overall (40 percent), while Oregon State was 16 of 59 (27.1). The Golden Bears allowed their third-lowest total to a conference opponent in program history.
Oregon State led 6-4 early before Cal used a 9-0 run to take the lead for good.
Brandon scored five points in that stretch, and Eliza Pierre's layin finished it to give the Golden Bears a 13-6 lead.
The Beavers later closed within 17-12 before Cal outscored Oregon State 10-2 over the last seven-plus minutes of the half to lead 27-14 at halftime.
Brandon and Layshia Clarendon combined for 17 in the first half.
Oregon State had its lowest first-half point total in a conference game this season by 10 points. It was also the fewest points Cal has allowed in a half this season.
The Beavers shot 6 of 28 in the first half, including 0 for 7 on 3-pointers, while the Golden Bears were 12 of 30 overall.