Miami Dolphins say Don Shula, the winningest coach in pro football history, has died at age 90
1972 Miami Dolphins season - Wikipedia
NFL Network Names Undefeated 1972 Dolphins as Greatest Team in NFL History, News, Scores, Highlights, Stats, and Rumors
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1972 Miami Dolphins: The inside story of the only perfect season in NFL history
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Don Shula, Legendary Miami Dolphins Coach, Has Died At 90 : NPR
1972 Miami Dolphins: The inside story of the only perfect season in NFL history