LOS ANGELES -- Chamberlain Oguchi has a shooter's mentality, so it didn't matter that he hadn't scored for the first 24½ minutes Thursday night.
He was going to keep putting the ball up.
And that was a good thing for Oregon.
Oguchi scored all 22 of his points in the last 14½ minutes, and the Ducks rallied for an 84-73 upset over No. 12 Washington in the quarterfinals of the Pac-10 Tournament.
The seventh-seeded Ducks (15-17) will meet California (19-9) in the semifinals Friday night. The third-seeded Golden Bears advanced by beating sixth-seeded Southern California 82-67.
Oguchi, who scored a career-high 26 points in Oregon's 66-55 first-round victory over Washington State, missed his first six shots and the Ducks trailed 51-40 before he finally connected for the first time.
That was only the beginning for the 6-foot-5 sophomore from Houston, who entered the tournament averaging 8.4 points.
"I really didn't get discouraged at all," Oguchi said. "Shooters keep shooting. I knew eventually they were going to fall. We're never going to give up, we're just going to keep fighting. We knew the pressure was getting to them a little bit. We did a good job of keeping a foot on their throat."
Thanks mainly to Oguchi, the Ducks outscored the Huskies 54-32 in the second half.
"Give Oregon a lot of credit," Washington coach Lorenzo Romar said. "They came out and they were physical, they really tried to pound us. Maybe they wore us down.
"We just kind of lost our intensity in the second half. Oguchi got going, and we couldn't keep him in front of us. He got hot, he got them inspired. We couldn't turn it around."
Oguchi made six 3-pointers against both WSU and Washington for a tournament-record 12 with at least one more game to play. He wound up shooting 6-of-14 from outside the arc against the Huskies.
"They took him out of his game quite a bit, and it took him a half to get adjusted," Oregon coach Ernie Kent said. "I thought when we toughened it up on the defensive end of the floor, it got his offensive rhythm going.
"He's such a streaky shooter who can get on a rhythm, so I don't think anybody on this team feared him continuing to take shots. We knew at some point in time, he was going to get going."
Oregon's Aaron Brooks was ejected for elbowing Washington reserve Ryan Appleby in the face -- a flagrant foul -- midway through the first half. The referees ruled it fighting, resulting in an automatic one-game suspension and knocking Brooks out of the game against Cal.
Brooks, averaging 11.0 points and 4.5 assists, had five points, one assist, two steals and four turnovers before leaving.
Malik Hairston had 20 points and Ivan Johnson matched his career high with 16 points and also had a career-best 10 rebounds for the Ducks, who won for just the fifth time in their last 14 games and snapped a five-game losing streak to the Huskies.
Washington (24-6) entered the tournament with an eight-game winning streak.
Brandon Roy led the second-seeded Huskies with 30 points. Jamaal Williams added 17 points and Bobby Jones had 10 points and 11 rebounds.
"Oregon came to play for 40 minutes," said Roy, the Pac-10 Player of the Year. "We didn't have any fight -- they were the tougher team down the stretch. They fought like they had something to play for."
And that the Ducks do -- the winner of the tournament receives and automatic berth in the NCAA Tournament.
"It was a grow-up game for us," Kent said. "We grew up. I don't know where we go from here. That's the best game this group has played."
Oguchi's 3-pointer with 7:03 remaining gave the Ducks a 62-59 lead -- their first since the opening six minutes -- and they were on top the rest of the way. Oguchi scored 11 in a row Oregon points during one stretch.
Two free throws by Hairston and a dunk by Jordan Kent extended the Ducks' lead to 71-65 with 3½ minutes remaining.
A basket by Jones with 1:30 to play cut Oregon's lead to four, but the Ducks received three free throws by Hairston and a dunk by Johnson to extend their lead to nine with a minute to go.
Washington went on an 8-2 run early in the second half for a 49-36 lead.
The Ducks battled back, getting a pair of 3-pointers from Oguchi during a 10-4 run that made it 53-46. It was 57-46 when the Ducks ran off 11 consecutive points to forge a tie. Oguchi's 3-pointer with 8:11 remaining capped the run.
Oregon would go ahead for good a few minutes later, as Washington went on a 14-6 run to finish the first half for a 41-30 lead.
No. 13 UCLA faces Arizona in the opener of Friday night's doubleheader. The top-seeded Bruins routed Oregon State 79-47 and the fourth-seeded Wildcats topped Stanford 73-68 in quarterfinal action Thursday afternoon.
