Week 9 Power Rankings: How did another wild week change the top 25?

College football has truly become a week-to-week sport. Just ask USC. A week ago, the Trojans got field-stormed at Wisconsin after producing the lowest point total (7) for a Lincoln Riley-coached team. Saturday night, USC fans did the storming after their Trojans blitzed Ohio State for the most impressive win of Riley's tenure.

Ohio State became the fourth consecutive AP top-2 team to lose to an unranked opponent, although new quarterback Luke Fahey was far from the problem. Top-ranked Miami was on the ropes before rallying from a fourth-quarter deficit at North Carolina, and Indiana won a low-scoring overtime game for the second straight week, thanks to a 60-yard field goal from long-range…