Iowa ( 8 - 0 , 4 - 0 Big Ten ) checked in at No. 9 .
The No. 9 Hawkeyes showed up big and bad on the national radar with Tuesday 's release of the College Football Playoff rankings .
Hawkeyes ( 8 - 0 , 4 - 0 Big Ten ) checked in at No. 9 .
The No. 9 Hawkeyes showed up big and bad on the national radar with Tuesday 's release of the College Football Playoff rankings .