I understand what NFL 4-3 & 3-4 defenses look like, but why do teams need to choose one or the other? Why can't they just switch back and forth in a game? -
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NFL Football Has Become Mexico's Second-Most-Popular Sport
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Highlight: Erik Harris zooms through open gap to sack Mac Jones on third down
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Football gaps: The building blocks of every play, explained - Banner Society
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Michigan's Andrew Stueber NFL Draft Profile - Maize n Brew
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