Nick Collins. He made the biggest play of the game and also a great play to break up a would-be TD pass.
Peter King saw the game differently and actually picked Nick Barnett as his defensive player of the week--for the entire NFL:
Defensive Player of the Week
Nick Barnett, LB, Green Bay. To watch this game was to watch one of the most frustrating days of Peyton Manning's career. The Packers defense, led by Barnett (six tackles, two tackles for loss, excellent sideline-to-sideline athleticism), kept Manning scoreless on eight of 10 possessions and forced him into throwing two interceptions, both returned for Green Bay touchdowns.