How can you execute what you don't attempt? And the ask being put on these guys is almost impossible to execute. Very few linemen in the NFL can do the type of blocking the coaches are requiring these guys perform. And if they were SEC linemen trying to perform the same blocking schemes against SEC defenses they would be getting the same crappy results. That's why it doesn't matter who substitutes for whom. A good coach should have injected enough knowledge into his line by now to be able to make adjustments, but they can't make them, or are being told to continue the impossible. THEY ARE BEING COACHED TO FAIL. It's that simple.