PFF snap counts and grades for Nebraska's defense vs. USCby:Robin Washut•about 8 hours•RobinWashutRead In AppSouthern California Trojans running back Woody Marks (4) runs the ball ahead of Nebraska Cornhuskers linebacker John Bullock (5) during the second half at the Los Angeles Memorial Coliseum. Mandatory Credit: Gary A. Vasquez-Imagn ImagesHere are the final snap counts and grades for Nebraska’s defense in its 28-20 loss to USC on Saturday, courtesy of PFF.