McMahon was selected by the Boston Patriots in the 15th round (385th overall) of the 1968 NFL/AFL draft. He played for the Boston Patriots in 1968 to 1970 and for the renamed New England Patriots in 1972.[1] McMahon missed half of the 1970 season and all of 1971 due to injury.[3]
^Haley, John. "Presenting 'The History of Carteret Football'", The Star-Ledger, November 29, 2012. Accessed January 9, 2018. "There are believed to be just three former Ramblers who played or are playing in the NFL.... Next was 1964 graduate Art McMahon, who would have a successful career with the Boston Patriots."