 The Philadelphia Eagles ran the 3–4 from 2013 to 2015 but switched back to the 4–3 for the 2016 season.The New England Patriots returned to a 4–3 defensive front at the end of the 2011 season but use more of a hybrid employing some 3–4 looks.The Cleveland Browns used the 3–4 in 2016, but returned to the 4–3 in 2017 under new defensive coordinator Gregg Williams.