The Arizona Cardinals placed No. 7 overall draft pick Jonathan Cooper on injured reserve Friday, ending his season after he broke a leg during a preseason game.
The rookie offensive guard sustained the injury in the third quarter of Saturday night's 24-7 loss to the San Diego Chargers. He was hurt while blocking downfield at the end of a running play when running back Alfonso Smith got tackled.
"Based on the medical prognosis and weighing all of the other factors, we decided that placing him on IR made the most sense for the team and for Jonathan," Cardinals general manager Steve Keim said in a statement. "Knowing his work ethic and commitment, we have no doubt Jonathan will come out of this experience fully ready to be a key contributor next season and for many more beyond that."
Cooper was a standout at North Carolina and the Cardinals expected him to help an offensive line that struggled last season.