There was some talk aeons ago that the store would be able re-stock shelves and racks and where necessary swap out entire teams (for whichever NFL is in town i assume) really quickly they're restocked from behind or something so when a rack gets low the display does a tracy island and a fully replenished rack appears in its place.
I may have made all this up of course, i mean there's hardly going to be a rush for this seasons home shirt is there.