At one time there were two professional leagues in American football, the National Football League and the American Football League. As would be expected the two Leagues competed for players and for fans. Representatives from the two leagues met and worked out a merger agreement where the leagues would combine and play as one. One of the conditions of the merger was that the champion of both leagues would play a game to determine the champion of American football. This game was called the AFL-NFL World Championship Game for the first four years. After the merger was completed, the name of the game was officially changed to the Super Bowl.