I don't think a Long Snapper position would exist. LS are usually backup lineman, so it wouldn't make sense to have a specific position for it. However, it would be easier with the expanded rosters to include every team's LS in the game, and make them a decent Lineman so we could keep them as a serviceable backup if we wanted, or cut em outright and make someone else the LS. Some teams use a LB as the long snapper.