Grauer's greatest fame lies in his legendary 40-year career in radio. In 1930, the 22-year-old Benjamin Franklin Grauer joined the staff at NBC. He quickly rose through the ranks to become a senior commentator and reporter. He was the designated announcer for the popular 1940s Walter Winchell's "Jergens Journal". Perhaps, most importantly, he was selected by Arturo Toscanini to become the voice of the NBC Symphony Orchestra. Grauer took over as announcer in late 1942, and remained until the orchestra was disbanded in June 1954. Toscanini said he was his favorite announcer.