Robert F. Simon Studio, through which he became an understudy to Lee J. Cobb for the lead in Arthur Miller's "Death of a Salesman". Simon had two daughters, Barbara Ann Simon Callet (born 1941) and Susan Simon Thompson, and two sons, Robert Louis Simon (born 1950) and James A. Simon (born 1951). Simon's webpage does not include the name of his spouse(s). Simon appeared on Broadway in Clifford Odets's play, "Clash by Night". In 1949, he succeeded Lee J. Cobb as Willy Loman in "Death of a Salesman". His first film appearances were as Inspector Foley in "Where the Sidewalk Ends" (1950) and
Fredric March whereupon director Elia Kazan cast Lee J. Cobb as Willy, and Arthur Kennedy as one of Willy's sons, Biff Loman, two men that the director had worked with in the film "Boomerang" (1947). March later regretted turning down the role and finally played Willy Loman in Columbia Pictures's 1951 film version of the play, directed by Laslo Benedek, receiving his fifth and final Oscar nomination as well as a Golden Globe Award. March also played one of two leads in "The Desperate Hours" (1955) with Humphrey Bogart. Bogart and Spencer Tracy had both insisted upon top billing and Tracy withdrew,