James Ralph "Sully" Montgomery (January 12, 1901 – September 5, 1970) was an American professional football player and boxer. Montgomery played college football for the Centre Praying Colonels of Centre College in Danville, Kentucky. He came there from the state of Texas. Montgomery played professionally in the National Football League (NFL) for the Chicago Cardinals and Frankford Yellow Jackets. After football, Montgomery was a professional boxer. He was the sheriff of Tarrant County, Texas from 1946 to 1952, but resigned after being convicted of tax fraud.