Iowa’s defense came up with two second-half safeties, and the Hawkeyes opened the season with a 7-3 win over South Dakota State on Saturday.

Spencer Petras threw a 44-yard touchdown pass to Nico Ragaini to complete No. 3 Iowa’s comeback from a two-touchdown deficit, No. 4 Penn State’s offense did next to nothing after quarterback Sean Clifford was knocked out of the game and the Hawkeyes held on for a bruising 23-20 victory Saturday.