VT, I'm not saying I should be the one teaching college level man or zone defenses. I'm saying the mental part of it, when taught by a professional, is not that freaking taxing. there's a handful of things for the player to learn in how his specific coach wants man defense played. I say a handful. if you want to argue that there's 20 or 50 things a defensive player needs to learn ... I don't care. learn it. you have months to learn it.
now physically, that's a different story. if you don't have the athleticism it doesn't matter that you know it. but the coach teaches how he wants it played, and the player then does it. whether it's man, or a 2-3, or a 1-3-1, or a match-up, etc. these are smart kids in a tough school. learning how to play defense can't be the most difficult thing they learn here.