Matt Barkley

USC quarterback Matt Barkley, who completed only five of 16 passes in the second half last week, is sacked by the Ducks defense. (Don Ryan / Associated Press / October 31, 2009)

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USC tries to rebound after its humiliating defeat at Oregon, its worst loss in Coach Pete Carroll's nine seasons. Arizona State would like nothing more than to make it two weeks of misery for the seven-time defending Pacific 10 Conference champions. Times staff writer Gary Klein looks at some of the game's key issues and matchups:

Passed tense

USC Coach Pete Carroll and quarterbacks coach Jeremy Bates raved about quarterback Matt Barkley's performance against Oregon, but the praise seemed over the top.

Though Barkley did not turn the ball over until his final pass was intercepted, the freshman was far from stellar. He uncharacteristically underthrew one receiver. He also overthrew another for what could have been a touchdown. He completed only five of 16 second-half passes.

Barkley, who has passed for nine touchdowns with six interceptions, now faces the Pac-10's top-ranked defense, an aggressive unit that has a conference-best 13 interceptions.

Meantime, USC's defense breathes a sigh of relief. Oregon quarterback Jeremiah Masoli is in Palo Alto to play Stanford and can no longer torment the Trojans -- until next season, perhaps.

Arizona State quarterback Danny Sullivan is neither as efficient as Oregon State's Sean Canfield nor as mobile as Masoli. He has completed 54% of his passes with eight touchdowns and seven interceptions. Samson Szakacsy, who at one time committed to USC, is more mobile and could be utilized in goal-line situations as he was last week against California.

USC has made only three interceptions, none in its last three games.

Desert run

USC tailbacks Joe McKnight and Allen Bradford returned from Oregon with sore knees but were practicing at full speed by Thursday.

McKnight has averaged 89 yards rushing, Bradford 43. The Trojans need one or both to be effective against an Arizona State defense that ranks fourth nationally against the run.

Sun Devils running back Dimitri Nance averages 4.3 yards a carry and has five touchdowns. He'll be running against a Trojans front seven eager to redeem itself after giving up 391 yards rushing at Oregon.

Watch out for Williams

Anthony McCoy remains sidelined because of a sprained ankle and fullback Stanley Havili is still nursing a sore shoulder, so wide receiver Damian Williams will be vital for the Trojans as a pass catcher and punt returner.

Williams has 43 receptions and four touchdowns in eight games.

Arizona State's Kyle Williams has caught 37 passes, three for touchdowns, in seven games. Chris McGaha of the Sun Devils has 39 catches and three touchdowns in eight games.

Showcase position

USC's linebackers are still smarting, physically and emotionally, from the Oregon nightmare.

Middle linebacker Chris Galippo is fully recovered from a sprained neck, but Malcolm Smith is not on the trip because of a shoulder injury. Shane Horton starts on the weak side with Michael Morgan on the strong side.

Arizona State's linebackers have been wreaking havoc, especially freshman Vontaze Burfict, the former Corona Centennial High star who originally committed to USC.