PULLMAN, Wash. — Washington State was battling the loss of two key players and a two-decade history of losing at home to No. 23 UCLA.
But the Cougars got 20 points and 11 rebounds from Brock Motum and shocked the Bruins 73-61 on Wednesday night.
The win by the last-place Cougars broke a 19-game home losing streak to the Bruins that extended to 1993.
Royce Woolridge added 19 points for Washington State (12-18, 3-14 Pac-12), which also broke a nine-game losing streak that had put coach Ken Bone on the hot seat.
"It's nice to see these guys rewarded with a win," said Bone, whose team has repeatedly lost games in the second half this season. "It's a huge confidence builder."
Jordan Adams scored 18 points for UCLA (22-8, 12-5), which had won four straight games and came into Wednesday tied with Oregon for first place in the Pac-12.
Shabazz Muhammad added 14 points for UCLA on 4-of-19 shooting.
Washington State had lost its last eight games against the Bruins, who were coming off a win over No. 18 Arizona.
Washington State played without Mike Ladd (knee injury) and DaVonte Lacy (knee injury), their second- and third-leading scorers. Bone said Lacy is out for the rest of the season.
It didn't seem to matter, as the Cougars sliced up the Bruins inside for easy layups much of the game.
Washington State, which jumped to a big early lead and never trailed, held the Bruins 15 points below their scoring average, and outrebounded them 46-23. The Bruins shot just 38 percent in the game, compared to 49 percent for WSU.
"We showed we can compete with anyone," said WSU's Dexter Kernich-Drew, who had 11 points and 11 rebounds in a rare start because of the injuries.
The Bruins, who also got 10 points from Norman Powell, were outscored 44-20 in the paint, and were 8 of 29 from 3-point range.
Washington State scored the first seven points of the game, and then made four straight layups to build a 15-2 lead. The Bruins made only one of their first 10 shots.
The Bruins did not score their second field goal until there was 10:26 left in the first half and they trailed 19-4.
Washington State extended the lead to 25-4 with 8:28 left. The Cougars made 10 of their first 18 shots.
Muhammad made a 3-pointer to get the Bruins into double figures at 25-12, but Woolridge replied with a 3 for WSU.
Adams scored the last five points of the first half for the Bruins, on two free throws and a 3-pointer, but Washington State led 35-24. The Cougars shot 48 percent in the first while holding UCLA to 30 percent.
Muhammad's 3-pointer cut WSU's lead to 37-31 early in the second. D.J. Shelton scored three straight baskets for WSU to push the lead back to 43-33.
Layups by Woolridge and Motum gave WSU a 56-42 lead with 7 minutes left.
Two 3-pointers helped the Bruins cut WSU's lead to 60-52, but the Cougars made their free throws to stay ahead.
Stanford 83, California 70
At Berkeley, Calif., Chasson Randle scored 20 points, Josh Huestis added 18 and Stanford beat California, completing a season sweep and ending the Bears' seven-game winning streak.
Aaron Bright chipped in 16 points for the Cardinal (18-13, 9-9 Pac-12).
The game was stopped for nearly 10 minutes late in the second half after players from both teams began pushing and shoving one another during a break in play. Six players received technical fouls during the melee, two others were ejected for leaving the bench and a combined three assistant coaches from the two schools were also ejected. Allen Crabbe and Justin Cobbs, both of whom were involved in the fracas, had 24 points apiece for California. The Golden Bears (20-10, 12-6) lost for the first time since Feb. 7.
Washington 65, USC 57
At Seattle, Scott Suggs scored 18 points and redshirt freshman Jernard Jarreau added a career-high 12 to lead Washington to a win.
Jarreau and the Huskies (17-13, 9-8 Pac-12) combined to make 17 consecutive free throws over the final 17:40, following five consecutive misses to start the game.
Andrew Andrews scored five of his seven points in the final 2:07. Suggs scored 11 of his 18 points after halftime, making 8 of 13 shots for the game.
Dewayne Dedmon had 18 points for USC, which was leading 41-39 when he collected his fourth foul and came out of the game with 11:51 remaining. Washington went on to score nine unanswered points and never trailed again.