Dan Casey is a football coach, strategist, and writer. Known for his obsessive curiosity and clarity of thought, he has spent more than a decade studying football at its deepest levels-schemes, structure, decision-making, and the hidden margins where games are actually won. Through coaching, teaching, writing, and film study, he has earned the trust of coaches at every level of football, including opportunities to collaborate with and learn alongside NFL staffs. His work is defined by an uncommon ability to see the game both technically and philosophically-and to explain it in ways that make others better.Dan represents a modern evolution of football leadership: one rooted in shared knowledge, disciplined preparation, and respect for the craft. He has become a bridge between generations of coaches, translating complex concepts into practical tools while honoring the foundational principles that built the sport. More than tactics, his work emphasizes standards-how teams prepare, how leaders think, and how culture is built over time. Bring Your Own Pencil reflects that same ethos: a belief that success in football, as in life, is earned through intention, curiosity, and relentless attention to detail.