"They decide where they feel good about running: 'Is our matchup between the tackles better? Is our matchup better on the outside to the perimeter?' " Johnston said. "And then they are really gearing that run scheme to not really account for what they do defensively, but to attack it and take advantage of it. It's pretty impressive.".Wet.79 When one thinks of head impact in football, the ball is a natural first thought. But Kirkendall et al2 suggested that injurious head impact most often occurs when players compete for airballs. Boden et al10 studied 29 football concussions among 26 college players over two years.

If Belichick wins Sunday, his four championships will have come over 11 seasons, with Brady the only linchpin throughout. An entire NFL roster will have been turned over (around a brilliant quarterback) under the same coach, with championship results. And were it not for that helmetcatch by Tyree four years ago, Belichick might have a fifth r