‘Williams is Gibbs’s only defensive coach because Gibbs has been stifled by NFL rules that bar a team from interviewing an assistant under contract without receiving permission. Williams, the head coach of the Buffalo Bills the past three seasons, has wanted to hire a slew of his former assistants. He has received permission to interview Bills special teams coach Danny Smith and safeties/ third-down coach Steve Jackson. The Redskins are expected to hire them both this week.’