The USC Trojans are in firm command of the game on Saturday against the Wisconsin Badgers, using a pick-six by Mason Cobb to propel them to a 38-21 lead in the fourth quarter. But they got some bad news on their star linebacker Eric Gentry with less than six minutes remaining in the fourth quarter. CBS sideline reporter Jenny Dell let viewers know that trainers were evaluating his neck area. Shortly after that, Gentry was being carted to the USC locker room by training staff. Here’s the video of him heading to the locker room. Gentry is the leading tackler for the USC defense through four game…