This really is useful and informative. I imagine the coaching staff employs this kind of analysis. Despite the challenge the D-linemen have because they are in a reactive mode, as you described, it was so disheartening over the past several years to see other teams' D-linemen often just crashing through our O-line and disrupting plays. We simply have to have big, strong, smart and dependable O-linemen in order to have a good team. As has been said so often, "It all starts up front."