LOS ANGELES — Cheers and applause echoed out of Oregon's locker room and coach Dana Altman emerged in a soggy state, his white shirt and black pants stuck to him.
The party was on for the ninth-ranked Ducks after they beat Southern California 76-66 on Saturday to clinch the Pac-12 title outright, their first since 2002 and fifth in school history.
"We don't have many of these to hold onto. This is history," Altman said, noting stretches of 14 and 57 years between some of the previous titles. "Let's try not to make these droughts too long."
Tyler Dorsey scored 19 points and Elgin Cook added 17 for Oregon (25-6, 14-4). The Ducks overcame a 20-minute power outage in the first half at Galen Center and the Trojans' early run in the second half to close out the regular season with their fifth straight victory and 11th in 13 games.
Oregon had already secured the No. 1 seed for the Pac-12 tournament, which begins Wednesday in Las Vegas.
"You can think about it, but when it really happens, it's amazing," said Dwayne Benjamin, who had 14 points. "We're happy with the championship, but we're not satisfied."
The Trojans (20-11, 9-9) lost to Oregon for the 12th straight time, the Ducks' longest-ever winning streak against USC. Katin Reinhardt and Nikola Jovanovic scored 12 points each, and Jordan McLaughlin added 10 for the Trojans, who went 2-6 in their last eight games.
The Trojans opened both halves strong, outscoring the Ducks 13-4 to start the second half and take a 50-48 lead, their first since early in the game. After going 9 of 10 from the free throw line in the first half, they struggled in the second, making just 9 of 18.
"It's good to know we can battle against a top-10 team," Reinhardt said. "It's a whole new season starting Wednesday for us and we're really excited about it."
Shrugging off their history of slow starts, the Trojans opened the game by outscoring the Ducks 15-9. Cook and Dorsey combined to score 13 straight points in launching the Ducks' dominant offensive stretch that helped them shoot 59 percent in the half.
No. 18 Arizona 94, Stanford 62
TUCSON, Ariz. — Gabe York, a senior playing in his final home game, made nine 3-pointers to tie the school and McKale Center record and scored a career-high 32 points in No. 18 Arizona's rout of Stanford.
The Wildcats set a school record by making 18 3s on Saturday in 36 attempts.
Arizona's victory clinched at least the No. 4 seed in next week's Pac-12 tournament, meaning the Wildcats (24-7, 12-6 Pac-12) will get a first-round bye.
Roscoe Allen and Marcus Allen scored 16 apiece for Stanford (15-14, 8-10).
No. 25 California 68, Arizona St. 65
TEMPE, Ariz. — Tyrone Wallace matched a season high with 24 points and hit two decisive free throws in the final minute to lead No. 25 California to a comeback victory over Arizona State that earned the Golden Bears a first-round bye in the Pac-12 tournament.
Wallace scored 19 points in the second half and grabbed seven rebounds, and Jordan Mathews added 18 points for Cal (22-9, 12-6), which trailed by eight points halfway through the second half before securing the fourth 22-win regular season in school history.
Eric Jacobsen scored 20 points and fellow senior Gerry Blakes added 14 points for the Sun Devils (15-16, 5-13).
Oregon St. 86, UCLA 82
LOS ANGELES — Stephen Thompson Jr. scored 23 points and Oregon State held on to defeat slumping UCLA.
Olaf Schaftenaar added 17 points and Gary Payton II had 17 points, 5 rebounds and 6 assists for Oregon State (18-11, 9-9 Pac-12).
Hamilton finished with 21 points to lead UCLA (15-16, 6-12), which lost for the seventh time in nine games.