New England Patriots strategy

The New England Patriots generally run a modified Erhardt-Perkins offensive system and a Fairbanks-Bullough 3–4 defensive system, though they have also used a 4–3 defense and increased their use of the nickel defense.

The Patriots run a modified "Ron Erhardt-Ray Perkins" offensive system 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. 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).

The Erhardt - Perkins system traditionally had a reputation (whether or not earned) of being a traditional smash mouth offense that maximizes a team's time of possession and does not as frequently call upon its running backs to serve as receivers. Erhardt was famous for his adage, "throw to score, run to win." This may have been especially true during the years Bill Parcells ran this system as the head coach of the New York Giants. This system was thought to be particularly well suited for teams playing in harsh outdoor weather conditions of the northeast of the United States.

An example of a running play under this system is Zero, Ride Thirty-six. Zero sets the formation. Thirty indicates who will be the ball carrier running with the ball. Six indicates which hole between the offensive linemen the ball carrier will attempt to run through (see Offensive Nomenclature).

This offense traditionally used the run to set up the pass via play-action passing, faking the run in order to throw deep downfield when the defense is least expecting it. Despite its earlier reputation, this system is no longer a run first offense. Erhardt commonly ran the system in his later years spread wide open with multiple receivers (earning the moniker "Air Erhardt"), as NFL rules evolved to benefit the passing game. As a result of this influence, the Patriots will frequently run this offense with five potential receivers and an empty backfield should a favorable matchup present itself or as a function of available personnel. With the addition of Randy Moss and Wes Welker to the Patriots offense in 2007, the Patriots placed an emphasis on a wide open passing attack (with record setting results). As rules of the NFL have loosened to favor the offense, the Patriots have increasingly adopted a wide open approach, to the point that they are often now thought of as a short pass first team. The Patriots have also made good extensive use of the non huddle offense to tire out defensive personnel and to disallow substitutions.

...
Wikipedia