TUCSON, Ariz. — The Washington State Cougars are no longer upstarts.

Not after they defeated 20th-ranked Arizona, 72-66, Thursday night to complete their first season sweep of the Wildcats since 1983. By knocking off the once-mighty Wildcats, the 18th-ranked Cougars (18-4, 7-3 Pac-10) have stamped themselves as legitimate Pac-10 title contenders.

"A lot of you guys are surprised, but I'm not surprised at all," senior forward Ivory Clark told reporters. "I know what kind of team we have in that locker room, and those guys don't like to lose anymore."

Washington State won for only the fourth time in 48 games against Arizona coach Lute Olson. Olson stocks his roster with touted high school stars. The Cougars seem to sign anyone willing to spend four years in Pullman, Wash.

"They have McDonald's All-Americans, and we're just average guys," said Clark, who led the Cougars with 18 points.

Junior guard Derrick Low, an 'Iolani alum, added 13 points, and Daven Harmeling and Kyle Weaver each had 12 for the Cougars.

Chase Budinger scored 19 points and Mustafa Shakur added 13 for Arizona (14-7, 5-5), which lost for the sixth time in eight games.

NO. 5 UCLA 69, NO. 9 OREGON 57

Arron Afflalo scored 17 points and the Bruins (19-2, 8-2) shot 57 percent in beating the Ducks (19-3, 7-3) in Los Angeles to gain sole possession of first place in the Pac-10.

VIRGINIA 68, NO. 8 DUKE 66

Sean Singletary tied the score with a jumper late in regulation, then hit a falling, one-handed floater with a second left in overtime, lifting the Cavaliers (14-6, 6-2 Atlantic Coast Conference) over the Blue Devils (18-4, 5-3) at Charlottesville, Va.

HAWAI'I DIVISION II

BYU-HAWAI'I 93, HAWAI'I-HILO 83

Eric Boyce hit 7 of 11 3-pointers and finished with 25 points, and four teammates also scored in double figures as the Seasiders (16-5, 8-1 PacWest) beat the Vulcans (8-13, 5-4) Thursday night at Cannon Activities Center in La'ie.

Jermaine Odjegba added 14 points, and Lucas Alves, Paul Peterson and Wu Tai-ho each contributed 12 points for BYUH. Rashad Bilal scored 22 points, Travis Sobbers 21, Sam Wilhoite 14 and Vince Alvarado 11 for the Vulcans.

CHAMINADE 86, HAWAI'I PACIFIC 56

Zack Whiting had 20 points, 10 rebounds and nine assists, and the host Silverswords (13-7, 5-3 PacWest) rolled to a 42-27 halftime lead in cruising past the Sea Warriors (7-11, 2-6) at McCabe Gym.

Hayden Heiber made 5 of 6 3-pointer en route to 19 points, Stewart Kussler added 11, and James Francisco and Mike Green each had 10 for Chaminade. Logan Wolf scored 11 points to lead HPU.

HAWAI'I DII WOMEN

BYU-HAWAI'I 76, HAWAI'I-HILO 63

Latoya Wily had 25 points and 16 rebounds, Lesina Funaki added 14 points and Kayla Burningham 13, leading the Seasiders (10-10, 7-2 PacWest) over the Vulcans (3-14, 2-7) at Cannon Activities Center in La'ie.

Ashely Kualii scored 15, Amy Kaaiakamanu 14, Krystlelyn Omlan 13 and Sheila Azevedo 10 for UH-Hilo.

CHAMINADE 74, HAWAI'I PACIFIC 70

Brittnee Fonnesbeck had 25 points and 11 rebounds, helping the Silverswords (3-14, 3-7 PacWest) hold off the Sea Warriors (1-19, 1-9) at McCabe gym.

Simrin Cummins added 19 points and Katherine Carlisle 14 for Chaminade. Ashley Jenkins scored 23 points and Shannon Miyashiro 10 for HPU.