Shula, winningest coach in pro football history, dies at 90
Legendary Miami Dolphins coach Don Shula dies at 90
He kept the Dolphins' 1972 season perfect
Eagles remind Larry Csonka of '72 Dolphins, who had perfect season
Shula, winningest coach in pro football history, dies at 90
Don Shula, winningest coach in NFL history, dies at age 90 - KVIA
Don Shula: NFL coaching legend dies aged 90, NFL News
50 years later, '72 Dolphins remain unmatched in perfection
72 Dolphins' status as only perfect team may end in Valley, Sports