In American Football, the ultimate defensive goal is to adjust to stop the offense; knowing when, where, and what the offense will do is priceless. Today, computerized systems can give a lot of information to defensive coaches, but a defensive coach needs to visualize the data to respond appropriately. Spending a critical amount of time in a meticulous visual process is the only way to prepare for the game. This book explains in detail the art of scouting the offense to win games with the defense. You will learn how to diagram plays during a live game or from a computer video system. You will learn how to transfer each play-card to pre-established tendencies charts. When you have all the information on paper, you will learn how to find tendencies based on down and distance situations, sets and personnel formations, hash-marks, and field positions. Finally, when you have the tendency on hand, you will learn how to use it to prepare players, practices, and game plan.