Clarence Adolph Spiegel (July 12, 1898 – May 28, 1970) was a professional football player in the early 1920s. He played in the early National Football League for the Evansville Crimson Giants. He also worked as a promotion manager for about 30 years. Prior to that, he was the owner of a family-owned and operated furniture store located in Evansville, Indiana. During World War I, he served as a private in the Army.