That can happen when you hire a sorry ass coach.
Ancient history called...they want the Tampa 2 backface)(*^%
Tony Dungy. The most overated coach in history. The guy is known for his great defensive mind, yet could never get a decent defense out of the Colts and they ran the same coverage every freakin time. corners roll up, safetys split half the field, middle linebacker sprints back. Always rush 4 with Defesnive ends taking wide rush angles leaving giant holes for the rb. Colts run defense was always horrible. He never blitzed and always rushed 4. If I can see, I can only imagine what NFL minds thought.
Oh and then when Peyton would build up a lead, he couldnt do that prevent defense soon enough. A true NFL moron. But his nice guy approach and being black, everyone acts like he is so great.
Every team should run the 3-4 on defense and have real quarterbacks on offense.