who runs a 3-4 defense in the nfl
3–4 defense After becoming the predominant defensive alignment in the late 1970s-early 1980s,[1] the 3–4 defense declined in popularity over the next two decades, but experienced a resurgence in the 2000s among both professional and college football teams. As of 2017, NFL teams that regularly incorporate the 3–4 defensive alignment scheme as a base include the Green Bay Packers, Oakland Raiders, Los Angeles Rams, Pittsburgh Steelers, Baltimore Ravens, Arizona Cardinals, Indianapolis Colts, Kansas City Chiefs, New York Jets, Washington Redskins, Denver Broncos, Tennessee Titans, Houston Texans, and the Chicago Bears, who used the 3-4 as their base defense for the first time in 2015.
New England Patriots strategy The Patriots run a modified "Ron Erhardt-Ray Perkins" offensive system[1] installed by Charlie Weis under Bill Belichick. Both Ron Erhardt and Ray Perkins served as offensive assistant coaches under the defensive minded Chuck Fairbanks while he was head coach of the Patriots in the 1970s.[1] This system is noted for its multiple formation and personnel grouping variations on a core number of base plays. Under this system, each formation and each play are separately numbered. Additional word descriptions further modify each play (see below for examples).