20 NFL teams that started 9-0 since 1972 Miami Dolphins
The Perfect Team: Part 21 - Dolphins Run to Records - Miami Dolphins
1972 Dolphins remain only perfect team in NFL's 100 years: Here's every team's best unbeaten start
The CTE Link Between Players from the 1972 Miami Dolphins - The New York Times
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Miami Dolphins: The 100 Greatest Players in Team History, News, Scores, Highlights, Stats, and Rumors
1972 Miami Dolphins: The inside story of the only perfect season in NFL history
Do you consider the undefeated Miami Dolphins team the greatest team ever? - Quora
Five questions with '72 Dolphins alum Larry Seiple
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NFL teams that came closest to going undefeated, joining the 1972 Dolphins as members of the perfect club
17 facts about 17-0 Super Bowl VII champion Miami Dolphins - Los Angeles Times
The most significant worst-to-first NFL teams
Five Reasons the 1972 Miami Dolphins Will Forever Be the Only Undefeated NFL Team
How has the NFL's final undefeated team finished each season?