For example, a facemask penalty if called on the field even though it was clear that it shoulder pad was grabbed instead. Replay can step in and pick up that flag. If a flag is thrown for a hit to the quarterback’s head, they can review it to make sure the defensive player did in fact make contact to the helmet.

Let's dive into some of the changes Roger Goodell is making to the NFL's instant replay assistants this season.

The new season brings a batch of rule changes for teams and fans to get acquainted with. Here's what you need to know.