Has your opinion of the Big Ten changed after four weeks of college football? Ohio State, Oregon, Michigan and Penn State were top dogs at the outset of the season and that's mostly unchanged, but Illinois has launched itself into the conversation and the Iowa Hawkeyes might have something to say after a dominant performance in Minnesota.

Tennessee's 25-15 win over Oklahoma was enough to sway the minds of enough voters in the AP Top 25 Poll, as the Vols climbed one spot, surpassing Ole Miss to enter the top five. It was one of a surprising number of moves in the top 10 considering none of the teams lost their games.

Kaleb Johnson rushed for a career-high 206 yards and three touchdowns, with two scores in a dominant third quarter that propelled Iowa past Minnesota for a 31-14 victory that gave the Floyd of Rosedale bronze pig trophy back to the Hawkeyes.

I’m not sure I remember anybody in four games doing what he’s done,” Iowa coach Kirk Ferentz said of running back Kaleb Johnson.

Michigan football was on its proverbial death bed (OK, not really) but needed a win against No. 11 USC in the worst way. And much to the surprise of the college football landscape, the Wolverines eked out a victory,