By KEN PETERS
AP Sports Writer
PASADENA, Calif. - Drew Olson threw three of his four touchdown passes to tight end Marcedes Lewis and UCLA rolled to a 37-17 victory over Arizona on Saturday.
The win was the fourth straight by the Bruins (4-1, 2-0 Pac-10) after ending a six-game losing streak that included a five-game slump to end last season.
UCLA moved in front to stay when linebacker Chris Horton blocked Danny Baugher's punt and the ball bounced through the end zone for a safety just 1:45 into the game.
The Bruins opened a 23-3 lead by halftime on the way to beating Arizona for the fourth time in their last four meetings.
UCLA's defense, led by Spencer Havner, limited Arizona (1-4, 0-2) to Nick Folk's 41-yard field goal in the first half.
The Wildcats, however, were able to run the ball on UCLA's young defensive line, vulnerable so far this year.
Arizona's Mike Bell gained 134 yards on 21 carries, and backup tailback Chris Henry scored on runs of 1 and 2 yards in the third quarter.
The Wildcats held UCLA's Maurice Drew, averaging 167.25 yards rushing a game this year, to 22 yards on 11 carries.
Olson took up the slack by completing 17 of 25 passes for 234 yards. He connected with Lewis on scoring plays of 16, 12 and 18 yards.
The four touchdown passes were a career high for Olson. Lewis had career highs in receptions (six), yards (99) and TDs.
The powerful and agile 6-foot-6, 255-pounder made a circus catch on his first touchdown and bulled his way through a pack of defenders for the second.
On Lewis' first touchdown, he went up in the back of the end zone, fought with safety Lamon Means for the ball, then juggled it before he fell forward over Means, finally clutching the ball just inside the back line.
Later in the second quarter, he caught an Olson pass around the Arizona 3 and bounced backward a couple of yards when he collided with cornerback Antoine Cason. Lewis stumbled but put his hand down to keep from falling, then surged forward.
As he churned his legs, two, then three, then four defenders tried to push him back. Finally, in what looked like a rugby scrum, he pushed across the goal line.
His third TD reception, an 18-yarder in the third quarter, was routine - a crossing pattern where he was in the open.
Although they could run the ball, the Wildcats lacked offensive balance. Kris Heavner went 13-of-24, but for only 93 yards. He threw one interception.
The Bruins, whose lone defeat this year was a 31-20 loss to Oklahoma State in the season opener, took command early.
After getting the safety on the Wildcats' first possession, the Bruins drove 71 yards to score on their first series, with fullback Michael Pitre turning a screen pass into a 28-yard touchdown play.
The Wildcats, in their first season under coach Mike Stoops, have lost three in a row. They opened with a 21-3 victory over Northern Arizona, then lost close games to Wisconsin (9-7) and Washington State (20-19).