Stopping the Run When You Are Undersized out of the 3-3 Defense – Don Gelsomino

Coach Don Gelsomino, Head Football Coach at York High School (Elmhurst, IL), explains how his team stops the run despite being undersized. Basing out of a 3–3 stack that can flex into 3–4 looks, he details base run fits, DB support, and goal-line adjustments tailored for smaller defenses. The session also covers philosophy behind choosing the 3–3/3–5, game-planning strategies, and practical teaching points that translate across different defensive systems.