The first three weeks of the season have provided some clues about the College Football Playoff race, but collectively?
There's been nothing like this.
Week 4 features what will be the most impactful lineup of games in September, starting with a trio of top-20 matchups: No. 7 Notre Dame at No. 3 Georgia; No. 11 Michigan at No. 13 Wisconsin; and No. 8 Auburn at No. 17 Texas A&M. Be very careful about eliminating anyone on Sunday -- the first CFP rankings don't come out until Nov. 5 -- but there's a harsh reality that some teams could see their bubble burst this weekend.