M.J. Stewart must lead UNC’s secondary without former DC Chizik Posted Jul 10, 2017 Gene Chizik — UNC's defensive coordinator that helped right the ship on that side of the ball — has left town. He wasn’t alone, either. Defensive line coach Tray Scott departed for Ole Miss and Charlton Warren left to coach Tennessee’s defensive backs and special teams. One very important face does return on defense, though. Senior cornerback M.J. Stewart is back. (ACC Sports Journal)