Buckeyes quarterback Terrelle Pryor rallied his team from behind, and Dan Herron scored the game-winning touchdown with under two minutes remaining as No. 8 Ohio State emerged with a 20-17 win over No. 21 Iowa.

Pryor passed for 195 yards and rushed for 78 more, including a key 14-yard scramble for first down on the go-ahead drive. But it was Herron’s bruising one-yard touchdown run with 1:47 on the clock that gave the Buckeyes their fourth straight win and kept them in a tie for the conference lead.

Ohio State (10-1, 6-1 Big Ten) remained knotted with Wisconsin and Michigan State atop the standings.

Iowa (7-4, 4-3) suffered its second straight loss and fell two games back in the Big Ten.

A frustrated Pryor pulled his helmet off and stared at the ground after DeVier Posey dropped a 50-yard pass in the right side of the end zone, letting a sure TD slip through his hands.

But his bitterness quickly turned to jubilation during a go-ahead drive that was saved for the Buckeyes by their slippery quarterback.

Pryor scrambled 14 yards for a first down two plays after Posey’s drop, setting up the rest of a 76-yard drive that culminated in Herron’s burst over the goal line to make it 20-17 Ohio State with 1:47 remaining in the game.

Iowa failed to convert a 4th-and-21 on the ensuing possession, all but ending the game.