Hardy Brown (May 8, 1924 – November 8, 1991) was an American football linebacker in the National Football League (NFL), All-America Football Conference (AAFC), and the American Football League (AFL). He played college football at the University of Tulsa and then professionally for the San Francisco 49ers, Washington Redskins, and the Denver Broncos. He was one of only two men who played in the All-America Football Conference, the National Football League, and the American Football League (the other was Ben Agajanian).