Falcons' Defensive Coordinator Mike Zimmer was hired Tuesday for the same role with the Bengals, who have been dragged down by their defense for years. The 51-year-old Zimmer was available because of the Falcons' uncertainty over their next head coach. The Falcons hired Tom Dimitroff as general manager on Sunday and are still looking for a head coach to replace Bobby Petrino, who quit after 13 games.