[2]: 643  Among the many television series in which he guest starred are the westerns: The Rifleman, Colt .45, Yancy Derringer, Have Gun-Will Travel, The Tall Man, Gunsmoke, and Bonanza.

In the 1963-1964 season, Kenyon was cast as Shep Baggott in a recurring role in five episodes of the ABC western series, The Travels of Jaimie McPheeters[2]: 1105 .

[citation needed] In the film MacArthur (1977), he portrays General Jonathan M. Wainwright, who survived spending most of World War II in a Japanese POW camp.

Kenyon performed in the world premiere stage production of Edna St. Vincent Millay's Conversation at Midnight in Los Angeles, in 1961, in a cast that included James Coburn, Jack Albertson, Eduard Franz, and John Marley.

Three years later, Gist and Thorne re-created the production, which again included Kenyon, in Broadway's Billy Rose Theatre, where—under-financed, unable to afford promotion, or wait for word-of-mouth to kick in, and lacking the charisma and virtuoso acting of James Coburn—it ran for just eight previews and four performances.