The win clinched Southern Cal's first outright Pac-10 title since 1989.
Cornerback Will Poole had a pair of interceptions and returned one for a touchdown for the Trojans (11-1, 7-1), who are second in the latest BCS standings and need to hold off LSU when the final results are released Sunday in order to be assured of playing for the national title in New Orleans on Jan. 4.
Oregon State (7-5, 4-4) will play New Mexico in the Las Vegas Bowl on Christmas Eve.
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