Ireland was a supporting actor in several famous Western films such as My Darling Clementine (1946), Red River (1948), Vengeance Valley (1951), and Gunfight at the O.K. Corral (1957). His other notable film roles were in 55 Days at Peking (1963), The Adventurers (1970), and Farewell, My Lovely (1975).

Ireland also appeared in many television series, notably The Cheaters (1960–1962). He was given a star on the Hollywood Walk of Fame for his contribution to the television industry.