If you want or have a great quarterback, you have to surround that quarterback with a good offensive line. An offensive line that can keep him upright, open up opportunities, improve his vision down field, and have his back in a tough situation.
A quarterback needs a pair of tackles who will keep him upright. He’s looking for a couple of guards who will give him room to move around. He’s looking for a center who will be the brains behind the operation of the line as he scopes out the defense and makes the right calls from the line of scrimmage.