Arizona senior running back Nic Grigsby strained his right hamstring during team drills. It is unknown when he will be able to resume practicing.
A lot was expected from Grigsby last year after running for 1,153 yards and 13 touchdowns as a sophomore, but injuries limited him to a modest 581 yards and five touchdowns in 2009. He stated prior to spring practice that he was only 85% recovered from his shoulder injury sustained last fall.