Multiple formation and motion offenses of the modern football era present many challenges to a defensive squad. This book will prepare teams and individual players to not only defend, but attack and dominate whatever offensive tactics an opponent might employ. Author Ron Vanderlinden has been there, done that, as a coach and architect of several of the most formidable defensive teams in the past 20 seasons. From the University of Colorado's national champions in 1990 to the recent resurgence of Linebacker U. (Penn State University), Vanderlinden's high-pursuit, well drilled defensive players and units have enjoyed tremendous success.Now, in this book, readers can learn all the details of the defensive tactics and techniques, as well as the coaching points that can make these two defenses so effective. Football's Eagle and Stack Defenses will be the best defensive co-coordinator for this season and many seasons to come. Relevant and comprehensive for almost every team and coaching staff, these are the most popular defenses today, and this work presents them thoroughly, from the specific alignments and adjustments on game day to the teaching points and drills used in practices.