On the other hand, I certainly understand how much a "shutdown" corner can impact a defense, particularly when he is capable of neutralizing an opponent's No. 1 receiver or completely discouraging a quarterback from throwing to his side of the field. If a defensive coordinator has that kind of player in place, he can tweak his defense to help a vulnerable corner on the other side of the field. This can result in the defense using the CB1 on a No. 2 receiver, with a double-team or bracket on the No. 1, thus forcing the quarterback to settle for the third option in the passing game (think of the New England Patriots' philosophy). So I get it when defensive coordinators salivate at the possibility of adding a Richard Sherman, Patrick Peterson, Aqib Talib or even a Josh Norman to the mix. Those guys are high-level playmakers capable of reducing an opponent's options in the passing game.