Long snapping is a unique skill, and few NFL teams have more than one player who can do it well. So after the Eagles lost both their starting long snapper and their emergency backup long snapper in the same game last year, they’re seeking to expand protections for long snappers in 2017.

The Eagles have proposed a rule that would prevent the defensive team from hitting the long snapper until a full second after the snap. That would allow the long snapper to snap the ball and then put his head and hands up to protect himself before anyone can touch him.

The precise wording of the Eagles’ rule proposal is, “When a team is in scrimmage kick formation, a defensive player may not initiate contact with the snapper until one second has elapsed after the snap.” Breaking that rule would be considered unnecessary roughness, a 15-yard penalty and automatic first down.

During a December game, Philadelphia starting long snapper Jon Dorenbos suffered a season-ending wrist injury. That left Brent Celek as the emergency long snapper, but Celek got hurt during the game, too. Trey Burton then entered the game as the third-string long snapper and successfully snapped a ball to the holder on a field goal.

It was impressive that Burton could do that, but the Eagles would prefer not to have to rely on him again.