re: Dline.....

A small quick Dline can penetrate much better and get into the backfield and break the play up before it gets started. If we play a read and react Defense then were not so suited, need big bodies for that. But if Downs and Pep and Monty and the others can disrupt the play in the backfield the linebackers can come up and finish the play off and that will also cause turnovers. Its when you have a small line that doesn't try and penetrate you have the problem of big lineman wearing out smaller ones.