Davalos appeared in East of Eden (1955) as James Dean's brother Aron and portrayed the convict Blind Dick in Cool Hand Luke (1967). His other film credits include roles in I Died a Thousand Times (1955), All the Young Men (1960), The Cabinet of Caligari (1962), Pit Stop (1969), Kelly's Heroes (1970), Brother, Cry for Me (1970), Hot Stuff (1979), Death Hunt (1981), Something Wicked This Way Comes (1983) and Ninja Cheerleaders (2008).