Grant and Parker are joined by Coach Cody Alexander, co-DC at Mesquite Horn High School and football defensive guru. Coach A lays out what modern college football defenses are designed to do, how recent offensive developments (Lincoln Riley and Joe Brady, for example) will influence the direction of defenses, and gives some guidance on terminology and how to watch a defense. This podcast will be a valuable resource to come back to if you're interested in how coaches approach defense, the X's and O's behind Big 12 Defenses, and how to understand a defense's alignment and reactions when you're watching on Saturdays!

PURPLE THEORY is available on Apple Podcasts, Spotify, Stitcher, and wherever you listen to podcasts.

Follow our hosts on Twitter: @GrantMcGalliard, @statsowar

Follow our guest, Coach Cody Alexander, on Twitter! 

You can buy Coach A's books here, and find his articles, and resources for defense and coaching at MatchQuarters.com. #ArtofX