NFL’s updated targeting rule smart, but how will it be called?

There is still much to learn about the NFL’s rule change on a player lowering his helmet to initiate contact.

Specifically, how the rule will be enforced by officials during a game, Dallas Cowboys coach Jason Garrett said.

In short, the change makes it a foul if a player lowers his helmet to “initiate and make contact” against an opponent. It can be flagged for a 15-yard penalty and lead to an ejection.

“I would say I have a decent understanding. I’ve been in a lot of conversations [with the league],” Garrett said. “They do a very good job of trying to explain what it is and why they want to do things a certain way.”

But teams won’t have a full understanding of how the change is going to work…