0 What team achieved the only perfect season in NFL history in 1972? Dallas Cowboys Pittsburgh Steelers Miami Dolphins San Francisco 49ers Play Now More questions Lake Michigan is a vital water source to which major city? Play Now American author Walt Whitman was best known for writing in which genre? Play Now Enter your email to see the answer! By subscribing to TriviaTalent you are agreeing to our Privacy Policy and Terms of Use. See Results
