Michigan coach said after Michigan’s 38-28 loss to Iowa that > ‘s third-quarter injury aggravated a nagging shoulder ailment.Denard Robinson left during the third quarter after he was hit hard on a run, aggravating a shoulder injury that Rodriguez said bothered him all week.“He landed on it funny,” said Rodriguez, adding that he expects Robinson to play Oct. 30 at Penn State after resting during a bye week. Robinson also told a reporter “I’m all right, I’m good” after the game.