College Football Power Rankings: Mississippi State, Iowa among risers amid massive shakeup

Hold your breath, folks. The first month of the season ended with a bang as eight AP-ranked teams lost in Week 4, and the CBS Sports Power Rankings underwent a massive facelift.

We're also noticing new trends that prompt questions about the divide between the nation's elite and everyone else. AP-ranked teams are 72-6 against unranked opponents this season, the best winning percentage since the turn of the century. Home teams are also winning 77.8% of games by an average margin of 19.4 points, both the highest numbers we've seen since 2000.

Still, despite the trend showing a lack of parity, we had some shakeups Saturday. Two ranked teams were upset at home by unranked foes, and five ranked teams lost at home last week, including Michigan, Penn State and USC – the first time three ranked Big Ten teams lost at home in the same week.

No finish was as exciting as the hush the Hawkeyes put over the Big House. Iowa's Hank Brown hit Reece Vander Zee in the corner of the end zone for a 16-yard touchdown as time expired, handing Iowa its first win at Michigan since 2015 and bringing tears to the eyes of longtime…

Original source: https://www.cbssports.com/