Radney was born in Del Rio, Texas and took up the guitar at age 12. He began performing small-club gigs while attending the University of the South in Sewanee, Tenn., but eventually took a leave from school to try his luck in Nashville.
The gamble paid off in 1985 when he signed on as a staff songwriter at MTM Publishing. He soon struck up a partnership with Bill Lloyd, who joined the company two months later. Their songwriting collaboration, "Since I Found You," became a Top 10 hit for the Sweethearts of the Rodeo. RCA signed the duo as Foster & Lloyd. From 1987 to 1990, the duo released three albums that produced a series of Top 10 singles.
After a third album, the duo amicably disbanded and Foster pursued a solo career. His debut Del Rio, Texas (1959) appeared in 1992 and produced four hit singles that made the Top 40, including "Just Call Me Lonesome" and "Nobody Wins." The 1995 follow-up Labor of Love was released followed by his third solo effort, 1999's See What You Want to See.
Dualtone issued the live album Are You Ready for the Big Show?, a more traditional country outing, in 2001. A stream of albums followed including: 2002's Another Way to Go, 2004's acoustic album And Then There's Me (The Back Porch Sessions), and 2006's This World We Live In.