John Joseph "Jack" Karwales (June 22, 1920 – December 31, 2004) was a U.S. American football player. He played at the end and tackle positions for the University of Michigan in 1941 and 1942. Following four years of service in the United States Army Air Forces during and after World War II, he played professional football for the Chicago Bears in 1946 and for the Chicago Cardinals in 1947.