Super Bowl X Super Bowl X Super Bowl X was an American football game between the National Football Conference (NFC) champion Dallas Cowboys and the American Football Conference (AFC) champion Pittsburgh Steelers to decide the National Football League (NFL) champion for the 1975 season. The Steelers defeated the Cowboys by the score of 21–17 to win their second consecutive Super Bowl. They were the third team to win back-to-back Super Bowls. (The Miami Dolphins won Super Bowls VII and VIII, and the Green Bay Packers won Super Bowls I and II.) It was also the first Super Bowl in which both participating teams
Super Bowl III following season, 1969, would be the last one before the AFL-NFL merger. The AFL's Kansas City Chiefs would go on to defeat the NFL's Minnesota Vikings in Super Bowl IV. That victory by the AFL squared the Super Bowl series with the NFL at two games apiece before the two leagues merged into one. As part of the merger, the Colts were one of three NFL teams that moved to the newly formed American Football Conference (AFC) with the Jets and the other AFL teams (the other two were the Cleveland Browns and Pittsburgh Steelers, who were first division rivals