Sitka served the role of a literal "stooge," or straight man, to the Three Stooges throughout nearly 40 of their short films, most of which were filmed during Shemp's run as the third stooge. In addition to one single appearance during Curly's run with the trio, and a limited number of appearances during Besser's, Sitka returned as a near-regular character when the trio returned to film and television with DeRita. His frequent appearances with the trio, and his role as stooge to the stooges, have earned him the informal title of being the "fourth stooge".