The Cowboys rushed for a record 252 yards and their defense limited the Dolphins to a low of 185 yards while not permitting a touchdown for the first time in Super Bowl history.
Dallas converted Chuck Howley's recovery of Larry Csonka's first fumble of the season into a 3-0 advantage and led at halftime 10-3.
After Dallas received the second-half kickoff, Duane Thomas led a 71-yard march in eight plays for a 17-3 margin.
Chuck Howley intercepted Bob Griese's pass at the 50 and returned it to the Miami 9 early in the fourth period, and three plays later Roger Staubach passed 7 yards to Mike Ditka for the final touchdown.
Duane Thomas rushed for 95 yards and Walt Garrison gained 74.
Roger Staubach, voted the game's most valuable player, completed 12 of 19 passes for 119 yards and two touchdowns.
Dallas earned its first Super Bowl title, along with revenge for its close loss in Super Bowl V, by defeating Miami 24-3.
The Cowboys' rushing attack was the driving force in their victory, and quarterback Roger Staubach earned the Most Valuable Player award for directing that attack. He completed 12 of 19 passes for 119 yards and 2 touchdowns.
Leading 3-0, Dallas made it 10-0 on Roger Staubach's 7-yard touchdown pass to Lance Alworth following a second-quarter Miami fumble. Roger Staubach finished off the scoring in the fourth quarter with another 7-yard touchdown pass, this time to tight end Mike Ditka.
Other players of note in the game were Calvin Hill, Jim Kiick, Bob Griese, Paul Warfield, Marv Fleming, and Jim Mandich
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