Ronald Maurice Cahill (April 24, 1915 – September 6, 1992) was a National Football League (NFL) quarterback for the Chicago Cardinals. He was signed by the Cardinals as a replacement for Bud Schwenk, who had joined the armed forces. In his only NFL season, Cahill led the league in interceptions but did not win any of the ten games in which he played. In 1946, Cahill signed with the Buffalo Bisons of the newly formed All-America Football Conference (AAFC), but did not appear in any games.