Question: do the browns run a 3 4 defense

Answer: No, 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. The Cleveland Browns used the 3--4 in 2016, but are returning to the 4--3 in 2017 under new defensive coordinator Gregg Williams.