Clark Jarnagin
William Clark Jarnagin (May 24, 1914 – October 19, 1979) was an American football and basketball coach. He served as the interim head football coach at Hardin–Simmons University during the 1943 Sun Bowl. Jarnigan was the head football coach at West Texas State University—now known as West Texas A&M University—from 1958 to 1959. He was also the head basketball coach at Hardin–Simmons during the 1942–43 season.