The Gridiron Uniform Database: Jack Butler, Hall of Famer
Ron Cook: Art Rooney Jr. reflects on Steelers' 1974 class
Jack Butler Pro Football Hall of Fame
Jack Butler, Undrafted Hall of Famer, Dies at 85 - The New York Times
Pittsburgh Steelers in the Pro Football Hall of Fame - Sports Illustrated
Ranking the Pittsburgh Steelers' Top 25 Players of All Time, News, Scores, Highlights, Stats, and Rumors
Pittsburgh Steelers Facts for Kids
Jack Butler Pittsburgh Steelers