Tandon Doss dove in for a touchdown, snapping Ohio State's scoreless streak and getting Indiana within 10-7 early in the second quarter.
The wide receiver scored on a 7-yard pass play from quarterback Ben Chappell. Ohio State cornerback Chimdi Chekwa grabbed Doss at about the 3, but the wide receiver dove and reached the end zone before fumbling.
The Buckeyes entered the game with back-to-back shutouts. Ohio State extended the scoreless streak to nine quarters after blanking IU in the first 15 minutes.
IU's touchdown came with 12:50 left in the second quarter.