He had roles in TV series that included The Web, Peter Gunn, Johnny Staccato, Bourbon Street Beat, Perry Mason, Rawhide, The Untouchables, Sea Hunt, 77 Sunset Strip, The Lloyd Bridges Show, Dr. Kildare, The Outer Limits, The Alfred Hitchcock Hour, The Twilight Zone, Gunsmoke, The Wild Wild West, Mannix, Bonanza, Ironside, The Name of the Game, The F.B.I., Cannon, McCloud, Kolchak: The Night Stalker, Baretta, Barnaby Jones, and Hawaii Five-0.

He also showed his acting prowess in a supporting but important role of Charlie Rondell in an episode of The Virginian (1968), titled "The Crooked Path."

He played Max Berns, a film producer who was a caring father figure to Burt Reynolds in the stuntman tribute Hooper.

Marley's Broadway credits include The Investigation (1966), Sing Till Tomorrow (1953), The Strong Are Lonely (1953), Skipper Next to God (1947),[8] and Johnny Doodle (1942).

[1] Elsewhere on stage, Marley appeared in the world premiere production of Edna St. Vincent Millay's poetry drama, Conversation At Midnight in 1961 in Los Angeles, in an ensemble cast which included James Coburn, Jack Albertson and Eduard Franz.