Why Gregg Williams is the hottest defensive coordinator candidate despite checkered pastWilliams has been the top defensive assistant for six teams over last 21 years1/15/2019, 6:00 PMDec 30, 2018; Baltimore, MD, USA; Cleveland Browns head coach Gregg Williams stands on the field before the game against the Baltimore Ravens at M&T Bank Stadium. Mandatory Credit: Tommy Gilligan-USA TODAY Sports / Tommy Gilligan