Huerta made his film debut in the 1961 Italian sword-and-sandal film Ursus (as a wrestler). Beginning with The Secret Seven (1963), Huerta worked steadily in spaghetti Westerns, usually as portly bad guys, sometimes as drunken barflies and other atmospheric characters. Examples included The Relentless Four (with Adam West), Navajo Joe (with Burt Reynolds), Django, Bandidos, A Town Called Hell (with Telly Savalas and Martin Landau), and Sabata the Killer. One of his larger turns was as Bad Jim in 1969's Alive or Preferably Dead.