In American football, a 4–3 defense is a defensive alignment consisting of four down linemen and three linebackers. It is probably the most commonly used defense in modern American football and especially in the National Football League. NFL teams that use the 4–3 defense as of 2013 include the Dallas Cowboys, New York Giants, Atlanta Falcons, Oakland Raiders, Minnesota Vikings, Chicago Bears, Carolina Panthers, Denver Broncos,Cincinnati Bengals, Jacksonville Jaguars, Tennessee Titans, St. Louis Rams,Detroit Lions, New England Patriots, Tampa Bay Buccaneers, Seattle Seahawks, Buffalo Bills, and the Miami Dolphins and the Philidelphia Eagles The Broncos returned to the 4-3 with the hiring of John Fox as head coach. The Patriots returned to the 4-3 in the 2011 NFL Season. The New York Jets u