Jack "Doc" Kearns (August 17, 1882 – July 7, 1963) was an American boxing manager from the state of Washington. He is most famous for managing Jack Dempsey, who was World Heavyweight Champion from 1919 to 1926. He also managed Mickey Walker, Joey Maxim, and Archie Moore. He was given the nickname "Doc" from Dempsey. A book of his memoirs, The Million Dollar Gate, was published posthumously in 1966.