section_path: Game history/1970s: Dominant franchises
section_name: 1970s: Dominant franchises
paragraph_text: 1970s: Dominant franchises
  
  After the AFL–NFL merger was completed in 1970, three franchises—the Cowboys, Miami Dolphins, and Steelers—would go on to dominate the 1970s, winning a combined eight Super Bowls between them in the decade, with the Steelers winning four of the eight.
  
  The Baltimore Colts, now a member of the AFC, would start the decade by defeating the Cowboys in Super Bowl V, a game which is the only Super Bowl to date in which a player from the losing team won the Super Bowl MVP (Cowboys' linebacker Chuck Howley). Beginning with this Super Bowl, all Super Bowls have served as the NFL's championship game.
  
  The Cowboys, coming back from a loss the previous season, won Super Bowl VI over the Dolphins. However, this would be the Dolphins' final loss for over a year, as the next year, the Dolphins would go 14–0 in the regular season and eventually win all their playoff games, capped off with a 14–7 victory in Super Bowl VII, becoming the first and only team in the Super Bowl era to finish an entire perfect regular and postseason undefeated. The Dolphins would repeat as league champions by winning Super Bowl VIII a year later with a 24–7 win over the Minnesota Vikings.
  
  In the mid to late 1970s, the Steelers became the first NFL dynasty of the post-merger era by winning four Super Bowls (IX, X, XIII, and XIV) in six years. They were led by head coach Chuck Noll, the play of offensive stars Terry Bradshaw, Franco Harris, Lynn Swann, John Stallworth, and Mike Webster, and their dominant " Steel Curtain " defense, led by "Mean" Joe Greene, L. C. Greenwood, Ernie Holmes, Mel Blount, Jack Ham, and Jack Lambert. Many of the team's key players were selected in the 1974 draft, in which Pittsburgh selected four future Hall of Famers, the most for any team in any sport in a single draft. A fifth player, Donnie Shell, was signed by Pittsburgh after going unselected in the 1974 NFL draft; he too was later enshrined in the Hall of Fame. The Steelers were the first team to win three and then four Super Bowls and appeared in six AFC Championship Games during the decade, making the playoffs in eight straight seasons. Pittsburgh still remains the only team to win back-to-back Super Bowls twice and four Super Bowls in a six-year period.
  
  The Steelers' 1970s dynasty was interrupted only by the Raiders' first Super Bowl win in Super Bowl XI and the Cowboys' second Super Bowl win in Super Bowl XII. Conversely, the Vikings, with their Purple People Eaters defense, were the only other team to appear in multiple Super Bowls (IV, VIII, IX and XI) during the decade but failed to win each one.
  
  After the AFL–NFL merger was completed in 1970, three franchises—the Cowboys, Miami Dolphins, and Steelers—would go on to dominate the 1970s, winning a combined eight Super Bowls between them in the decade, with the Steelers winning four of the eight.
  
  The Baltimore Colts, now a member of the AFC, would start the decade by defeating the Cowboys in Super Bowl V, a game which is the only Super Bowl to date in which a player from the losing team won the Super Bowl MVP (Cowboys' linebacker Chuck Howley). Beginning with this Super Bowl, all Super Bowls have served as the NFL's championship game.
  
  The Cowboys, coming back from a loss the previous season, won Super Bowl VI over the Dolphins. However, this would be the Dolphins' final loss for over a year, as the next year, the Dolphins would go 14–0 in the regular season and eventually win all their playoff games, capped off with a 14–7 victory in Super Bowl VII, becoming the first and only team in the Super Bowl era to finish an entire perfect regular and postseason undefeated. The Dolphins would repeat as league champions by winning Super Bowl VIII a year later with a 24–7 win over the Minnesota Vikings.
  
  In the mid to late 1970s, the Steelers became the first NFL dynasty of the post-merger era by winning four Super Bowls (IX, X, XIII, and XIV) in six years. They were led by head coach Chuck Noll, the play of offensive stars Terry Bradshaw, Franco Harris, Lynn Swann, John Stallworth, and Mike Webster, and their dominant " Steel Curtain " defense, led by "Mean" Joe Greene, L. C. Greenwood, Ernie Holmes, Mel Blount, Jack Ham, and Jack Lambert. Many of the team's key players were selected in the 1974 draft, in which Pittsburgh selected four future Hall of Famers, the most for any team in any sport in a single draft. A fifth player, Donnie Shell, was signed by Pittsburgh after going unselected in the 1974 NFL draft; he too was later enshrined in the Hall of Fame. The Steelers were the first team to win three and then four Super Bowls and appeared in six AFC Championship Games during the decade, making the playoffs in eight straight seasons. Pittsburgh still remains the only team to win back-to-back Super Bowls twice and four Super Bowls in a six-year period.
  
  The Steelers' 1970s dynasty was interrupted only by the Raiders' first Super Bowl win in Super Bowl XI and the Cowboys' second Super Bowl win in Super Bowl XII. Conversely, the Vikings, with their Purple People Eaters defense, were the only other team to appear in multiple Super Bowls (IV, VIII, IX and XI) during the decade but failed to win each one.