I was bored one day a few years ago and looked up a few years of drafts to see where NFL OL came from. Surprisingly, 25% of them came from schools you never heard of. Division II and Division III schools, not top-25 powerhouses, or even Division I schools. That tells you that HS recruiting sites (and college coaches) have a really difficult time identifying potential star O-linemen. The top draft picks typically come from D-1 powerhouses, but a significant number of 2nd - 7th round draft picks come from nowhere. The only smart thing a college coach can do with that information is to make sure he has enough OL on the roster, and not run short, like we sometimes have been doing recently. I think it hurts a team if they can't have a "real" spring game, including the practices leading up to it.