arnett william "ace" mumford (november 26, 1898 – april 28, 1962) was an american football coach. he served as the head football coach at historically black colleges and universities in texas and louisiana from 1924 to 1961, compiling a career college football record of 233–85–23. his head coaching positions were at jarvis christian college (1924–1926), bishop college (1927–1929), texas college (1931–1935), and southern university (1936–1961). he has been inducted into at least eight halls of fame for his coaching accomplishments.