A lot has yet to be decided with regards to which Pac-12 team goes to which bowl. Two teams that could end up anywhere are the UCLA Bruins and the USC Trojans.
The latest bowl projections from ESPN's Mark Schlabach and Brad Edwards. USC is projected to end up in either the Alamo Bowl to play the Oklahoma State Cowboys, or the Sun Bowl where they'd play the Georgia Tech Yellow Jackets. On the other side of the city, UCLA would end up in either the Holiday Bowl to face off with the West Virginia Mountaineers, or the Las Vegas Bowl where they'd play the Boise St. Broncos.
Both UCLA and USC play each other next Saturday, with the winner advancing to the Pac-12 Championship game. Based on these projections, it seems as if both Schlabach and Edwards are projecting USC to beat UCLA and advance to the Pac-12 Championship Game. I'm guessing the Bruins have something to say about those projections, as they will be playing at home.