Any individual language’s alphabet is the base of how we perceive and write language when not spoken. In English, we’re taught all about A to Z in grammar school (and in Sesame Street), and that becomes the literate foundation needed throughout the rest of our lives.
When it comes to football, the base of our knowledge often stems from film analysis, on-site reporting, and healthy discussion. We don’t think of it in anything close to simple terms like an alphabet. It’s needlessly overcomplicated and turgid, like much of NFL offensive and defensive schemes are, not by coincidence.