College football rankings, grades: Michigan earns ‘A+,’ USC gets ‘D-‘ in Week 8 report card | CBS Sports Headlines College football rankings, grades: Michigan earns ‘A+,’ USC gets ‘D-‘ in Week 8 report card It’s time to grade the College Football Playoff contenders that stood out and struggled in Week … Continue reading College football rankings, grades: Michigan earns ‘A+,’ USC gets ‘D-‘ in Week 8 report card