NFL: The Miami Dolphins team of 'misfits' who won the Super Bowl undefeated - BBC Sport
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List of last undefeated NFL teams by season - Wikipedia
Five Reasons the 1972 Miami Dolphins Will Forever Be the Only Undefeated NFL Team
20 NFL teams that started 9-0 since 1972 Miami Dolphins
Top 5 Miami Dolphins Quarterbacks of All Time - Sports Illustrated
Miami Dolphins: The 100 Greatest Players in Team History, News, Scores, Highlights, Stats, and Rumors
NFL teams that came closest to going undefeated, joining the 1972 Dolphins as members of the perfect club
Perfect season - Wikipedia