[quote user="nycsportzfan"]What do u think all the coaches have been teaching this guy for the last 5yrs? How ot bullrush???lol U don't think the kids learned about hand placement from the last 4coaches hes had? [/quote]

First off, college and highschool coaches rarely have time to teach little things. They dont usually even have position coaches, and when they do, lets face it, its not like a college or highschool position coach is going to have the knowledge that an NFL coach does.

Second, you are VASTLY oversimplifying football. There is a ton of stuff for DEs to learn, how to read pass/run, how to combat various blocks, different positions, etc etc.