1972 Roger Staubach Signed Super Bowl VI Replica Lombardi Trophy. The twelfth time was a charm for this Lone Star State crew, which finally planted its flag atop the NFL mountain at the completion of a dozen seasons of existence. Though the Cowboys had been the dominant force in the NFC East for six years as they entered Super Bowl VI, they had yet to shake the perception as a team that couldn't win the big game, a widespread impression only hardened by their error-plagued loss to the Baltimore Colts in Super Bowl V. But their twenty-four to three domination of the Dolphins in New Orleans proved the doubters wrong, a victory that appears all the more impressive when considering it was Miami's final loss before posting the NFL's only perfect season in 1972.