1972 Miami Dolphins season - Wikipedia
Earl Morrall, who started nine games at QB for the '72 Miami Dolphins, dies at 79 – New York Daily News
Johnny Unitas - Wikipedia
Former Dolphins QB Earl Morrall dies at 79
Report: Former QB Earl Morrall also had CTE
The most underappreciated running backs in NFL history
Historical Perspective V - Nineteen seventy-perfect - The Phinsider
Former Dolphins QB Earl Morrall dies
A player-by-player look at the 1972 Dolphins and what they did after perfection – Sun Sentinel
1972 Miami Dolphins: The inside story of the only perfect season in NFL history
Earl Morrall, longtime NFL quarterback, former MVP, dies at 79 – Twin Cities
Miami Dolphins, American Football Database
Quarterbacks past and present on safety, future of football