NFL - There's only one team to ever do it. #72Dolphins 50
NFL - 50 years later, there's still only one perfect team
1972 Miami Dolphins: The inside story of the only perfect season
1972 Miami Dolphins: The inside story of the only perfect season
50 years on, the 1972 Miami Dolphins' undefeated season remains
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1972 Miami Dolphins: The inside story of the only perfect season
'72 Dolphins, voted best team, toast perfection - ESPN
1972 Miami Dolphins: The inside story of the only perfect season
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50 years later, '72 Dolphins remain unmatched in perfection