Here are Herbstreit's top four teams.
Kirk Herbstreit has a new top four.
The ESPN college football analyst unveils his College Football Playoff foursome after each week of the season.
This week's top four features a new team at No. 1 - Clemson.
The Tigers, coming off their dominant showing at Louisville, reside atop Herbstreit's top four.
Here's the full list:
Here's what it looked like after Week 2:
Week 4 will be highlighted by No. 4 Penn State's trip to Iowa. That game is set to kick off at 7:30 p.m. E.T. on ABC.