50 years on, the 1972 Miami Dolphins' undefeated season remains
Dolphins defeat Patriots 20-7, Sports
1972 Miami Dolphins: The inside story of the only perfect season
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The 1972 Miami Dolphins are STILL the only undefeated NFL team in
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UNFLAPPABLE AND UNDEFEATED
Five Reasons the 1972 Miami Dolphins Will Forever Be the Only
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UNFLAPPABLE AND UNDEFEATED