An updated edition to the definitive work on the multiple 4-3/numbers defense. Former athletic director and coach Dennis Harris puts his 39 years of coaching experience into this extremely detailed and thorough yet easy-to-understand and implement reference on the multiple 4-3. This beefy 300+ page manual provides detailed defensive philosophy (including defensive front seven, coaches responsibility, huddle, no huddle, signal system, alignments, combinations, and more), and offers concise individual player techniques for defensive tackles, defensive ends, inside linebackers, outside linebackers, and defensive backs. Also covers pass coverage, stunts, and special defenses. Special appendices on installing the defenses and a sample of defensive implementation.