The vast majority of MLB, NHL and National Basketball Association (NBA) games are carried through regional sports networks, however the NFL only permits preseason games to air on RSNs on a limited basis (the league otherwise prohibits regular season and playoff games from airing on regional sports networks, but does permit national cable networks to acquire the rights to air them); the leagues (as well as the NFL) restrict the broadcast of their sports on regional networks to specific territories and require any person outside those territories to purchase an out-of-market sports package to watch the majority of their favored team's games.