John George Prchlik (July 20, 1925 – December 31, 2003) was a professional American football defensive lineman in the National Football League. After playing college football at Yale, Prchlik was drafted by the Boston Yanks in the 30th round (277th overall) of the 1947 NFL Draft. He played five seasons for the Detroit Lions including their 1952 and 1953 Championship seasons. John Prchlik died December 31, 2003 of pancreatic cancer in Fairfield Glade, Tennessee at age 78.