What is “the box” when referring to defenses in American football

Gus Bradley Glossary: The Responsibilities of the Strong Safety - Sports Illustrated Indianapolis Colts News, Analysis and More

No, defenses have not figured out Patrick Mahomes and the Chiefs offenses

Inside Penn State's Playbook: Diamond Formation - For The Blogy

Understanding the 4-2-5 Defense

How the Browns built one of the NFL's best defenses - ESPN

with Frank Chimienti,, C.W. Post Defensive Coordinator, Cover 8 is defined as an eight-man front with a 7, 3, 1 and 5 technique backed by four

Coaching DBs and Outside LBs in Cover 2 & Cover 8 Defense within the 4-4 Defense

4–3 defense - Wikipedia

Defensive Line Technique and the 4-3 Over Front - Shakin The Southland

PFF50: The 50 best players in the NFL right now, NFL News, Rankings and Statistics

NFL Health and Safety Related Rules Changes Since 2002