High Quality Content by WIKIPEDIA articles! Robert J. "Bob" Derleth (born June 9, 1922 in Marquette, Michigan) was an American football lineman. He played college football for the University of Michigan Wolverines football teams in 1942, 1943, 1945 and 1946—missing the 1944 season due to military service. He also played professional football for the Detroit Lions in 1947.