Martin Henry Conrad (November 30, 1895 â July 1, 1942) was a professional American football offensive lineman in the National Football League. He played for Kalamazoo College as a center in 1915 and won a letter in 1913-14 He played four seasons for the Toledo Maroons (1922âÂÂ1923), the Kenosha Maroons (1924), and the Akron Pros (1925).