Week 4 of the college football season has come and gone. Here's the updated US LBM Coaches Poll and AP Top 25 poll ahead of Week 5:

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.

USC made its Big Ten debut in a memorable matchup at the Big House, while Oklahoma had an SEC opener to forget against Tennessee.