I hope this post was meant as a joke, because it lacked any knowledge of things happen at the line of scrimmage. Now I want you to go back like you said to these old films and watch these lineman. Now watch a film from today and you will see that todays "lardbutts" on the whole are much more athletic than there skinny counterparts. That is what makes them amazing. And if you think that offensive lineman are not required to fire off the line of scrimmage,you have haven't paid very close attention. I'm also not sure if you noticed that defensive lineman are also getting much larger and quicker. Now I would be interested in seeing anyone in the world pass block these quick defensive lineman without using their hands, o-lineman are having a hard enough time when they are using their hands. As for your theory that offensive lineman are obstacles with arms, you are right, just like offensive lineman before them were obstacles with arms. Sometime just for fun watch an offensive lineman for a few plays in a row. You will see them: take on a bull rush, try to stop a d end from turning the corner to the quarterback, take on a defensive tackle on 3rd and short, try to cut off a linebacker on the backside, get out in front of the runningback on a screen, pull and trap. I am guessing you were joking but I want to make sure others know just how athletic some of these "lardbutts" really are!!