Halftime: Oregon 34, USC 24

LOS ANGELES -- It was a first half full of offensive frenzy and turnovers, but Oregon and USC head into the locker room with the Trojans within striking distance, trailing 34-24.

USC gets the ball to start the third in a game where you can't waste too many possessions because the defenses are struggling.

The Trojans had three first-half turnovers, including a pair of Matt Barkley interceptions, but Barkley also threw three touchdown passes, including strikes of 75 and 76 yards. He completed 17 of 26 passes for 303 yards.

At 27-10 Oregon early in the second quarter, it looked as if the Ducks might run away with it. They still might. But not yet.

Ducks quarterback Marcus Mariota completed 14 of 16 passes for 213 yards with three touchdowns, but he had a fumble late in the second quarter at the USC 15-yard line after he seemed to get shaken up on the preceding play.

Oregon running back Kenjon Barner is headed toward a big night. He has 169 yards and two scores on 16 carries.

It figures that turnovers and precious defensive stops will be the key in the second half.