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Stanford forward Josh Huestis goes over Southern California guard Maurice Jones as Garrett Jackson, right, helps defend during the first half of an NCAA college basketball game in Los Angeles, Sunday, Feb. 12, 2012. (AP Photo/Chris Carlson)

LOS ANGELES -- Freshman Chasson Randle helped Stanford begin to climb out of a four-week offensive funk, and he did it against the Pac-12's stingiest defense.

Randle made four 3-pointers in the second half, including two in a row to highlight a decisive 11-0 run, and the Cardinal went on to a 59-47 victory over USC on Sunday afternoon at the Galen Center.

Stanford (17-8, 7-6) won for just the second time in seven games and moved into a tie for sixth place alongside UCLA with three weeks left in the regular season. The win was its first over USC in Los Angeles since 2005 and came three days after the Cardinal lost here to the Bruins for the seventh straight year.

Last-place USC (6-20, 1-12) scored seven straight points to trail just 35-33 before Stanford's Josh Owens dunked off a feed from Aaron Bright, and Anthony Brown made a short jump shot. Randle then hit two 3-pointers in a span of 33 seconds.

"I'm pretty confident," Randle said. "I feel like I'm a pretty good shooter. I'm going to take my looks when they're there."

"Those two crushed us," USC coach Kevin O'Neill said.

When Andrew Zimmermann made a free throw with 7:54 left to punctuate the 11-0 run, Stanford's lead was 46-33.

Stanford coach Johnny Dawkins was proud of Randle but not surprised.

"I thought he stepped up during that moment. They were making a run and he did a good job, especially on the road, of making some big plays. It shows maturity," Dawkins said.

"He likes the moment. A lot of freshmen, they have a tough half and the second half they may not bounce back. That's really rare, but that's the belief he has in himself."

Randle scored all 16 of his points in the second half, including a 3-pointer that triggered an opening 8-0 run and stretched a 20-18 lead to 28-18. Owens added 15 points for Stanford.

Tied for first place after a win over Colorado on Jan. 14, Stanford had shot just 35.7 percent in five defeats since then.

It wasn't much better early against the Trojans, who lead the conference in scoring defense. Stanford had more turnovers (10) than baskets (eight) in the first half and wound up with 18 giveaways, pushing its total for the weekend to 40.

But Stanford warmed up to shoot 56 percent and score 39 second-half points after making just 33 percent in the opening 20 minutes. Stanford also used its size advantage to forge a 45-19 rebounding margin.

"I thought we started figuring it out a little bit in the second half," Dawkins said. "It's coming. We had a tough stretch, and we've had to battle through that. I know we will."

USC, which has won just once since Dec. 19, reached 20 losses in a season for the first time since 1989.

The league's lowest-scoring and worst-shooting team, USC converted just 31 percent and failed to reach 50 points for the third game in a row.

No one had a tougher game than Maurice Jones, the Trojans' 5-foot-7 dynamo and leading scorer. He missed his first nine shots and finished 2 for 14 with 10 points.

The highlight of the first half was the first career field goal by third-year Stanford forward Andy Brown, who's undergone three surgeries on his left knee since his days at Mater Dei High-Santa Ana. Appearing in just his fourth game, Brown scored on a putback with 10:31 left to give the Cardinal a 12-11 lead.

Thursday's game

Oregon State (15-10, 5-8 Pac-12) at Stanford (17-8, 7-6), 7 p.m.