Kevin Gemmell It's a fascinating week in the Pac-12. With unranked ASU and Colorado both on bye, there is one matchup of ranked teams and the rest of the games feature a ranked Pac-12 team versus an unranked team. This is the first time since 2002 that six Pac-12 teams have been ranked in the top 25, and all of them are in action this weekend. That should set off the upset alert sirens.Tonight No. 13 USC faces Utah. Saturday, it's a full slate with No. 18 Stanford hosting Arizona, No. Originally posted by ESPN.com - Pac-12 Blog Click here to view the article.