subscriber also receives local stations from the provider, and permitted providers to deliver superstations to commercial businesses. Conflicts with professional sports leagues Much of the appeal of superstations to viewers came from the national carriage of sporting events involving professional league teams that contracted their telecasts to the originating stations within home markets. Although professional sports teams benefited heavily from their national exposure—especially with regards to WTCG/WTBS's carriage of the Atlanta Braves and the Atlanta Hawks, and WGN-TV's broadcasts of sporting events featuring the Chicago Cubs, Chicago White Sox and Chicago Bulls—superstation broadcasts of National Basketball Association (NBA) and Major League Baseball (MLB) games were met with resistance from league commissioners, who contended these telecasts—regardless of the positive effects on team loyalty—diluted the value of their national television contracts with other broadcast and cable networks. Some superstation operators (like Ted Turner and former Tribune Company vice president John Madigan) note a lack of corroborating evidence of any negative effects on game attendance and league revenue, suggesting that sports leagues have used superstation telecasts of their games as a scapegoat for financial problems incurred by the league caused by other factors such as the performance of certain teams and management issues. The only federal restrictions applying to sports events shown on superstations and other imported signals was the so-called "same-game rule," enacted by the FCC in June 1975 to prohibit cable systems from retransmitting a sports event through a distant signal within a zone around the city of the home team's arena if the game is not airing on a local television broadcaster, with a subsequent amendment requiring the broadcast rights-holder to inform local cable systems of game deletions no later than Monday of the preceding calendar week of the proposed deletion. (Other leagues had proposed a broader blackout zone: the National Hockey League [NHL] suggested that the protection zone should be extended across a team's entire home market, while the National Football League [NFL] and Major League Baseball each advocated for a zone, with the latter also seeking a zone around the cities of minor league franchises and a zone around a team's local television rights-holder.) The major professional sports leagues eventually imposed their own broadcasting restrictions around the number of games that could air annually on any out-of-market stations, which resulted in superstations sometimes substituting sports events with syndicated programming and feature films in adherence. (This had an adverse