Broadcasting of sports events
NBC broadcast the first televised National Football League (NFL) game when they carried the 22 October 1939 game between the Philadelphia Eagles and the Brooklyn Dodgers. The same year, the first nationwide radio broadcast of an NFL championship game was carried on the Mutual Broadcasting System. While the NFL had weak television deals that ranked behind college football and even the Canadian Football League in the 1950s, the broadcast rights of the NFL would go on to become an important property following the 1958 NFL Championship and the later establishment of the American Football League in 1960. "Monday Night Football", "NFL on Fox", and "NBC Sunday Night Football" have changed the landscape of American football broadcasts, including the scheduling of the Super Bowl, transforming it from an afternoon broadcast into a primetime spectacle. The price for the NFL's broadcast rights has increased steadily over the past several decades, in part because of bidding wars between the numerous networks and the fear of losing stature due to the loss of NFL programming; as of the most recent contract the league nets annual fees of over $6 billion, or half of the league's overall revenue, from television rights alone. Four of the five major sports television units in the United States, and the four companies that control all of the major broadcast networks, currently own some NFL rights.
NFL on CBS
When the AFL and the NFL officially merged in 1970, the combined league divided its teams into the American Football Conference (AFC) and the National Football Conference (NFC). It was then decided (officially announced on January 26, 1970) that CBS would televise all NFC teams (including playoff games) while NBC would carry games from all AFC teams. For interconference games, CBS would broadcast them if the visiting team was from the NFC and NBC would carry them when the visitors were from the AFC. This was in line with the NFL television blackout rules of the time, meaning that every televised game of a local NFL team would be on the same channel (at the time, home games were banned from local television regardless of sell-out status, while road games are required to be aired in the teams' primary media markets, and select neighboring markets as well, even if it is not the most popular team in the market). The two networks also divided up broadcast rights to the Super Bowl on a yearly rotation.