You guys can laugh all you want, but in five years you'll see New England, KC and other elite teams with tackles and guards somewhere in the 5'8" to 5'10" range with 44"-46" arms. As the "heads up" tackling method becomes more popular, shorter and heavier players pack more punch than tall, muscular players. We can re-visit this thread in a few years and you can all laugh then....or apologize to those of us who at least have a rudimentary understanding of physics.