Keeping the Saints out of the end zone – even in the preseason – is an accomplishment, and that’s what the Patriots were able to do last Thursday night. They’ve followed up that performance with a week of practice that featured the defense flying around and causing havoc for Brady and his offense, including a number of interceptions. The test it will face in the Eagles is different than what the defense has seen before, as Michael Vick adds an element of elusiveness from the quarterback position that can prove lethal on any snap.