Robert Dickey "Jack" Sisco (November 2, 1904 – December 18, 1983)[1][2] was an American football player, coach, and official. He served as head football coach at the University of North Texas from 1929 to 1941. With a record of 74–37–10, Sisco is the second winningest coach in school history, behind Odus Mitchell. His teams won seven conference championships and tied for three others.
After his coaching career, he became a college football referee best remembered for a controversial call in the 1947 Red River Shootout between the Texas Longhorns and Oklahoma Sooners.[5][6][7] To this day, some Sooner fans refer to this as the "Sisco Game".[8]