It was the 10th time the Bruins have upset a No. 1 team.
LOS ANGELES -- Its storied reputation sullied for most of the season, UCLA pulled off another surprise under beleaguered coach Steve Lavin.
The Bruins stunned No. 1 Arizona 96-89 in overtime Thursday in the opening round of the Pac-10 Conference tournament, once again showing their penchant for turning things around after a disappointing regular season.
The loss ended Arizona's 10-game winning streak, although the Wildcats (25-3) probably will earn a No. 1 seed in next week's NCAA tournament.
It was the 10th time the Bruins have upset a No. 1 team. UCLA (10-18) lost its two regular-season games to Arizona by a combined 71 points, but five Bruins scored in double figures this time, led by Jason Kapono's 26 points.
No. 5 Pittsburgh 67, Providence 59
NEW YORK -- Pittsburgh held Providence to one field goal over the final 51/2 minutes to advance to the semifinals of the Big East tournament.
Donatas Zavackas had 16 points to lead the fifth-ranked Panthers (24-4).
Donnie McGrath had 17 points, all but two on 3-pointers, for the Friars (16-13), while Ryan Gomes, who was double-teamed and forced away from his favorite spot on the block, had 16 points and 11 rebounds.
UAB 83, No. 8 Marquette 76
LOUISVILLE, Ky. -- Eric Bush scored 17 points and tied a Conference USA tournament record with six steals to lead Alabama-Birmingham's upset.
Morris Finley scored 23 points and Demario Eddins added 16 points and five steals for the Blazers (18-11), who set a tournament record with 20 steals.
Conference USA Player of the Year Dwyane Wade set a tournament record with 10 turnovers as Marquette (23-5) lost for just the second time in 17 games. Travis Diener scored 19 and Robert Jackson had 18 to lead the Golden Eagles.
No. 10 Xavier 78,George Washington 73
DAYTON -- David West scored 27 points and Xavier (25-4) set a school record with its 16th straight win in advancing to the Atlantic 10 quarterfinals.
West also had 13 rebounds and a team-high four assists. Chris Monroe scored 21 for George Washington (12-17), which had 18 turnovers and shot 39 percent from the field.
No. 11 Syracuse 74,Georgetown 69
NEW YORK -- Carmelo Anthony, Billy Edelin and Gerry McNamara made six straight free throws down the stretch and No. 11 Syracuse held off Georgetown to advance to the semifinals of the Big East tournament.
Anthony led Syracuse (24-4) with 21 points while Kueth Duany added 16 and Warrick 14. Mike Sweetney had 29 and 13 rebounds for Georgetown (15-14) and Brandon Bowman scored 18.
Southern California 79,No. 15 Stanford 74
LOS ANGELES -- Desmon Farmer scored 24 points and Roy Smiley added a career-high 20 for Southern California (12-16).
Julius Barnes led Stanford (23-8) with 18 points and Justin Davis added 15 points and 11 rebounds.
No. 16 Memphis 62, S. Florida 56
LOUISVILLE, Ky. -- Chris Massie had 18 points and 11 rebounds, and Memphis overcame a poor shooting performance.
Rodney Carney scored 18 points and Antonio Burks added eight assists for the Tigers (23-5). Will McDonald had 16 points and nine rebounds for South Florida (15-14).
No. 20 Louisville 82, Tulane 66
LOUISVILLE, Ky. -- Reece Gaines scored 15 points and Luke Whitehead had 11 points and 11 rebounds for Louisville (22-6). Francisco Garcia scored 15 and Otis George added 14 for the Cardinals.
Waitari Marsh scored 17 and Brandon Brown and Nick Sinville added 12 points each for Tulane (16-15), which committed a season-high 25 turnovers.
No. 22 Dayton 74, Rhode Island 57
DAYTON -- Keith Waleskowski scored 16 points and Sean Finn added 15 as Dayton (22-5) won in the Atlantic 10 tournament.
In the first half, the Rams (18-11) went for more than 10 minutes without scoring a field goal, shooting just 21 percent.
No. 24 California 69, Oregon St. 46
LOS ANGELES -- Richard Midgley scored 12 points and Brian Wethers added 11 for California in the Pac-10 tournament.
The third-seeded Bears (21-7) beat Oregon State for the 11th straight time.
Brian Jackson had 12 points and nine rebounds for the Beavers (13-15).
No. 25 St. Joseph's 68, La Salle 48
DAYTON -- Delonte West returned from his leg injury Thursday night, and Pat Carroll hit several pivotal 3-pointers as St. Joseph's (23-5) pulled away.
Jameer Nelson led the Hawks with 15 points, and Carroll added 14. Gary Neal and Jermaine Thomas had 13 apiece for La Salle (12-17), which shot only 33 percent from the field.