Plantilla:See also WGN-TV has had a long association with the Chicago Cubs, whose games have aired on the station since the station signed on in April 1948; the station's corporate parent, the Tribune Company (which operates WGN-TV through its Tribune Broadcasting subsidiary) purchased the National League franchise in 1981, eventually selling the team to businessman Thomas S. Ricketts in 2008. Legendary Chicago sportscaster Jack Brickhouse, the longtime sports director (and later vice president of sports programming) for WGN-TV and sister radio station WGN (920 AM), served as the play-by-play announcer for both the Chicago Cubs and White Sox until 1967, when the White Sox (for whom Brickhouse performed play-by-play duties for home games) ended their first stint on WGN-TV; Brickhouse primarily called Cubs games until his retirement from broadcasting in 1981. Another legendary sports broadcaster, Harry Caray (who served as a fill-in sports anchor on the station's newscasts during the 1970s) served as the lead play-by-play announcer for the White Sox on television and radio from 1971 to 1981, before joining the Cubs with the 1982 season.