Baer in the 1930s served on radio as director of special events for KSL. His first network show was "The Whistler", which was soon followed by appearances on "Escape" (notably narrating "Wild Jack Rhett" and as the title patriot in an adaptation of Stephen Vincent Benet's "A Tooth for Paul Revere"), "Suspense", "Tales of the Texas Rangers" (as various local sheriffs), "Dragnet", "The CBS Radio Workshop", "Lux Radio Theater", "The Six Shooter", and "Yours Truly, Johnny Dollar", to name a few.