With that, a third-and-8 at Iowa State's 27 turned into a first-and-10 near midfield, and eventually it led to Iowa State scoring the game-winning touchdown.
It was the kind of self-inflicted wound that's plagued Oklahoma throughout the season and the kind that the No. 12 Sooners desperately need to eliminate to get the season back on track after the stunning loss.
“(Iowa State) made a couple contested plays,” coach Lincoln Riley said after his team's 38-31 loss. “But the ones I'm more disappointed about are the ones where we weren't there, the ones that we had the penalties on.”
The Sooners allowed the Cyclones to pick up five first downs on their penalties, including a personal foul committed by linebacker Ogbonnia Okoronkwo on third-and-goal. Had Okoronkwo not been flagged for piling on, the Sooners likely would've forced Iowa State to kick a second-quarter field goal.
Source : https://newsok.com/article/5567267/ou-struggles-with-penalties-in-upset-loss-to-iowa-state