- Face guarding in the NFL is the act of trying to block the vision of a receiver from being able to see the football when attempting to catch a pass.
- There are rules in the NFL against pass interference, but there are no such rules against face guarding. A defender can block a receiver's view of the ball with any part of his body.
- If the defender makes physical contact with a receiver while trying to block his view of the football before the ball arrives, that is considered pass interference. The penalty is for pass interference, not for face guarding.
- One of the more controversial calls was made in the 2007 AFC Championship Game, when analyst Phil Simms indicated a Patriots defender, Ellis Hobbs, was penalized for face guarding. The NFL later indicated it should not have been a penalty.
- Considering face guarding is not a penalty, a defender does not have to be "looking for the ball" when breaking up a pass for the receiver. Instead, he just needs to make sure he makes no physical contact at all with the receiver before the ball arrives.













