There was a lot of upheaval in the PAC-12 last year. Many coaches who had been rolling for a while saw their programs falter. A few who had been waiting in the wings pounced. Mark Helfrich was fired after overseeing Oregon’s first losing season since 2004 and was replaced by up and coming Willie Taggart. Sonny Dykes and Cal agreed to part ways after an uncomfortable final two seasons. He will be replaced by Justin Wilcox, a relative unknown. This power ranking will try to balance the recent season with the overall body of work that each coach has accrued along with the recent success or failures of the past few seasons.