From 1953 to 1959, professional football's offensive and defensive tactics were in a transitional phase. As teams developed innovative strategies to attack the 5-2-4 defense, passing efficiency improved. In an attempt to counter this newfound passing success, the 4-3-4 defense evolved. This crucial shift in strategies is often overlooked in histories of the NFL, yet its impact on the game is still seen today. The Birth of Football's Modern 4-3 Defense: The Seven Seasons That Changed the NFL chronicles this key development in professional football. In this comprehensive review and analysis, T....