Ouillette scored on 1- and 3-yard runs and gained 130 yards on 27 carries. Vick was 4 of 6 passing for 68 yards, including a 12-yard TD to Sebastian Smith.
With Idaho (0-3) driving, but trailing 23-17 in the fourth quarter, Poling picked off a pass by Matt Linehan and returned it 32 yards to the Vandals' 5. Sprague scored three plays later on a 1-yard run.
Linehan responded with a 52-yard TD pass to Joshua McCain to make it a five-point game, but Ouillette put the game out of reach with a 3-yard TD run for Ohio (2-2). Linehan was 33 of 55 for 353 yards and two TDs, both to McCain.