Rad Robinson's professional journey began in 1930 as a member of The King's Men quartet, alongside Ken Darby, Jon Dodson, and Bud Linn. From 1934 to 1937, they were a prominent feature of the Paul Whiteman Orchestra on RCA records and the Kraft Music Hall, sharing the stage with renowned orchestra leaders like Rudy Vallee.
The King's Men's impressive resume includes numerous appearances in feature films, such as Sweetie (1929),Hollywood Party (1934),Let's Go Native (1930),Belle of the Nineties (1934),Alexander's Ragtime Band (1938),Murder at the Vanities (1934),and The Wizard of Oz (1939),where they provided the off-screen voices for the Lollipop Guild.
On screen, they were remembered as the singing cowboys of the Hopalong Cassidy films. In the costume party scene of the film Honolulu (1939),the King's Men played the role of the Marx Brothers, with Rad Robinson portraying the wavy-haired Groucho.
For a few years, they were associated with the Music Department at Disney Studios, contributing to projects such as Make Mine Music (1946),Pinocchio (1940),and the long-running radio show "Fibber McGee & Molly." The King's Men's legacy also influenced the Ken Darby Singers, featured on John Charles Thomas' "Westinghouse Broadcasts" and on many Decca phonograph records, including Bing Crosby's original recording of "White Christmas."
When not singing, Rad Robinson ventured into the entertainment industry, serving as the entertainment contractor for the five Howard Hughes hotels based in Las Vegas.