 The New York Jets have announced that despite hiring Gregg Williams as their new defensive coordinator they will continue to employ the 3–4 defense in 2019, opting to stay with the scheme that better suits their current roster instead of switching to the defense Williams usually uses.In 2018, the Detroit Lions switched to hybrid 3–4, 4–3 defensive front now that former Patriots defensive coordinator Matt Patricia has taken over as head coach.In the 2019 season, the Tampa Bay Buccaneers switched to a 3–4 defense under new defensive coordinator, Todd Bowles, who previously ran the 3–4 defense with the New York Jets.