It looks like it's either Stanford or Oregon in the North and USC, Utah, or UCLA in the South. If USC loses to Oregon (highly likely), I think the winner of Utah - UCLA would be in, right? Of course that USC-UCLA game might have a say.
http://pac-12.com/article/2015/11/14/pac-12-football-standings-oregon-stanford-ucla-usc-utah
http://pac-12.com/article/2015/11/14/pac-12-football-standings-oregon-stanford-ucla-usc-utah
