They also got very few negative run plays. Even when they had a busted block and a guy got immediate penetration into the backfield Cook was pretty good and getting back to the line or falling forward for a yard.
It's a reality that the Bills were exceptionally good last year at not getting behind the sticks. I like Brady I think he is a smart coordinator but it remains to be seen how this offense looks if playing from 2nd and long and 3rd and long became a much more regular occurance.