Tyrell Roberts broke a tie game with 8:58 remaining Saturday afternoon and host Washington State held on to beat California 65-57 at Pullman, Wash.
Andrej Jakimovski had a team-high 16 points off the bench, including a key late 3-pointer, and Michael Flowers added 13 for the Cougars (10-7, 3-3 Pac-12), who won for the second time in their last three games.
The Golden Bears (9-9, 2-5 in Pac-12) were swept on their two-game trip to the state of Washington despite getting a game-high 17 points from Jordan Shepherd.
After Roberts' hoop put Washington State on top for good at 49-47, Jakimovski nailed his 3-pointer to increase the advantage to 56-49 with 5:02 to play before Cal rallied.
Andre Kelly hit from inside and Jalen Celestine bombed in a 3-pointer to give Cal a chance to tie, but Makale Foreman missed a short shot with 3:22 remaining, allowing Washington State to retain its lead.
Flowers made it a five-point game with a 3-pointer and Mouhamed Gueye broke the game open with a free throw and a dunk, the latter giving the Cougars a 62-54 lead with just 1:33 remaining.
Eight of Flowers' 13 points came at the foul line, where he had nine attempts. That was only five fewer free-throw attempts than Cal's team total.
The Golden Bears went 10-for-14 at the line, the Cougars 15-for-21.
Gueye finished with nine points and a team-high eight rebounds for Washington State, which was coming off a 62-57 home loss to Stanford on Thursday.
The game featured just 11 made baskets from 3-point range, four by Jakimovski in seven tries. Washington State finished 6 of 22 on 3-pointers, while Cal went just 5 of 20.
Shepherd had three of Cal's five 3-pointers on six attempts.
Kelly was the game's leading rebounder with 14 to complete a double-double with 12 points for the Golden Bears, who lost their fourth straight. They lost 64-55 at Washington on Wednesday.
--Field Level Media