Why has no one mentioned the fact that Mario Williams is playing all positions along the line? Why no mention that in his first game he forced the Philly Eagles to scrap about 10 of their base running plays because his combination of size, quickness, and speed would allow him to get to the ball carrier totally unblocked.
Williams is a special talent. He's just as special a D-Linemen as Bush is a RB. Difference is that RB is a lot easier to make the NCAA to NFL transition. Especially when said Lineman is learning all the line positions at once.