There are three dominant schemes in the NFL: "West Coast, Air Coryell, and Erhardt-Perkins," as Chris B. Brown writes in his book, The Art of Smart Football.
"Given that every NFL team runs the same plays, each of these NFL offensive families is differentiated mostly by how these plays are communicated."
Starting with the passing game.
The Memory System
"The system is as old as football itself, which is no surprise given that Bill Walsh's onetime mentor Paul Brown is credited as much as anyone with inventing the modern conception of huddles, game plans, and play calls. For more than
