Game Preview: Ohio State looks to keep winning streak going at Iowa

Ohio State (7-1, 5-0 Big Ten, CFP No. 6) at Iowa (5-3, 2-3), Saturday, 3:30 p.m. ET (ESPN).Line: Ohio State by 18.Series record: Ohio State leads 47-14-3WHAT'S AT STAKEOhio State revived its playoff hopes with a comeback win over Penn State last week. But the Buckeyes likely have to win out to get back to the College Football Playoff for the third time in four seasons. Iowa could use a big win in what's been a disappointing season so far.KEY MATCHUPOhio State QB J.T. Barrett vs. Iowa's defensive