... teaching football, coaches try to look for the easiest way to teach their players what they want them to do. Over the years, various numbering systems have been developed to form the foundation upon which more complex ideas can be built. One such system is the numbering method used for the alignment of the defensive lineman.

This numbering system is referred to as “defensive line techniques.” In a sense, the name is a little bit misleading because the numbering system instructs a defensive lineman where he is to line up in relation to the opposing offensive lineman. It is not a step-by-step procedure on the type of blocks to use or what he should “key” off of in different downs and di...

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