Great thread! This was Shanahan's bread and butter for a few years. It made some average running backs look real good. Say what you want about Elway, it was the blocking scheme that got him his rings. Kubiack took it with him to Houston and has evolved it there. While still fairly effective, like all things the other side figures out how to counter it and it loses its overwhelming advantage. Just looking at Denver's history, I'd almost say that it leads to running back injuries more than any position on the defense although I have nothing solid to back that up. Just none of the RB's lasted very long there and did nothing when moving to a different team. The defense hates it most because it makes them look stupid when it works.