It's the BCS- it's based on rankings and automatic bids. There are three at large bids for the BCS and the Big10 and Pac10 are fighting over the third bid. If Oregon St wins the Pac10 automatic bid, USC will be the third at large. If USC wins the automatic bid, no one else from the Pac10 will get in and the next option would be Ohio St. I don't know why we haven't considered the undefeated Utah as an at large bid. They are more deserving than Ohio St.