Louis "Foose" Clark was an American football player and coach at both the college and professional levels. He played for St. Mary's College—now known as the University of Dayton— from the 1908 through 1911 seasons before becoming their head coach. Clark was also the first head coach of the Dayton Triangles, an early professional football franchise that entered into the National Football League after Clark's playing and coaching careers for the team were over.