http://www.patsfans.com/bob/display_story.php?story_id=3015According to this, the Patriots nickel package did not include Tedy Bruschi, but did include a pass rush specialist like Colvin. So, they basically had 5 down linemen, 1 LB (Vrabel), and 5 DBs (including Troy Brown).How did this happen? Two basic elements helped shut down the Bengal offense. First, the Patriots shifted from a base 3-4 defense to a quasi-base 4-3, which explains why Jarvis Green had three sacks and one forced fumble. In the 4-3, the Patriots played five defensive backs (including Troy Brown) and two linebackers (primarily Mike Vrabel and Rosevelt Colvin), making it actually a 5-2-4. The four down linemen helped slow down Rudi (14 carries, 65 yards, 41 of those yards in the first half).
Meanwhile, the nickel package in the secondary did perhaps the most important defensive job of the game, that being taking the vaunted Bengal receivers out of the game. Of special mention here is Hank Poteat, who shows up occasionally on the Patriot roster and seems to come up with big plays at the right time. He made three key defensive plays including one pass defensed. Poteat, along with Chad Scott and Brown, helped neutralize the strong Bengal pass attack.
I figured Bruschi was their best cover LB and would be unlikely to leave the field. I also figured Seau would be in for a good week against the Bengals running game but it looks like he barely played. Obviously, the Patriots are the type of team who will change their entire defense from week to week, so we can't read too much into this. But, I just thought it was interesting and worth passing along.