Marvin Leroy Keyes (February 18, 1947 – April 15, 2021) was an American professional football player who was a running back and safety for five seasons in the National Football League (NFL) with the Philadelphia Eagles and the Kansas City Chiefs. He was drafted by the Eagles in the first round of the 1969 NFL Draft. He played college football for the Purdue Boilermakers. He was an All-American as a halfback on offense and played corner on defense and returned kicks and punts. He also played both ways for Philadelphia before settling in as a solid strong safety.