what kind of offense does bill belichick run
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).