College football rankings, grades: Penn State gets an 'A+', Clemson handed an 'F' in Week 3 report card | CBS Sports Headlines College football rankings, grades: Penn State gets an 'A+', Clemson handed an 'F' in Week 3 report card A look at how College Football Playoff contenders fared in … Continue reading College football rankings, grades: Penn State gets an 'A+', Clemson handed an 'F' in Week 3 report card