Panthers coach Ron Rivera expects Mike Mitchell and D.J. Campbell to compete at strong safety. Haruki Nakamura isn't in the mix after his disastrous 2012. Charles Godfrey will start at free safety. Mitchell is a run-stopping specialist. He started just eight games in four years with the Raiders. A 2012 seventh-rounder, Campbell played 252 snaps on defense as a rookie. On paper - and likely in practice - the Panthers have one of the league's worst secondaries.