Born in California, Marsh began his career as a child actor in Hollywood, for one thing uncredited, dressed in costume as one of the Three Little Pigs in the Laurel and Hardy 1934 classic Babes in Toyland.
[1] In November 1969 Marsh wrote a letter to Time magazine, using his "Zebedy Colt" pseudonym, in response to an article published in its October 31, 1969, edition entitled "Behavior: A Discussion: Are Homosexuals Sick?
"[3] His films as a director include Farmer's Daughters (1976, starring a young Spalding Gray), White Fire (1976, as Roger Colmont),[4] the sadistic The Devil Inside Her (1977, shot at Marsh's home in Lambertville, New Jersey), Unwilling Lovers (1977), and Terri's Revenge (1977).
As an actor in adult films, he starred in such pictures as Radley Metzger's Barbara Broadcast, Gerard Damiano's The Story of Joanna,[5] Manhold—a 3D film—and the Death Wish porn rip-off Sex Wish.
On Broadway, he served as Anthony Newley’s understudy in The Roar of the Greasepaint - The Smell of the Crowd and performed in The Royal Family, Dark at the Top of the Stairs and an award-winning 1976 production of Tom Stoppard's Travesties.