USC quarterback Mark Sanchez dislocated his left kneecap and was carted off the practice field Friday, as reported by the Associated Press. Sanchez was injured after making a throw during practice and landing awkwardly. He was taken for X-rays and an MRI, and team doctors say there is no ligament, cartilage, or bone damage. He is listed as day-to-day. Sanchez said he hopes to be back in time for the Trojans? opener Aug. 30 at Virginia.