Mancow holds an American nationality and belongs to the white ethnicity. He began his professional career while he was in his teenage. Muller operated his own DJ business in 1990 to earn extra money by providing music to school dances and wedding.
Mancow Muller moved to "KOKO" radio station in Warrensburg, as a board operator for a late-night show. His role at station slowly broaden and he was selected as the general manager of "KLSI- FM" in Kansas City, which offered him a full-time job.
Later Muller left the Kansas City, as he appointed at "KDON-FM" in Monterey, Calfornia. On November 20, 2005, Muller began running the news of the Morning Guest and caller Ray Hoffater Aka of Mancow's Morning Madhouse, who was hit by a car and died on January 11, 2006.
On December 6, 2005, Muller appeared on "Fox News channel", where he assigned with Democratic National Committee chairman Howard Dean for "vile", "bloodthirsty" and "evil". Muller while working with Howard once complained that he was planning a false regarding the war in Iraq.
Muller started his career as an actor by playing "Eurotrash" in 1996. Later he portrayed in numerous movies and TV shows including Fragile, Home Groan, Hurt, Na Triboildi, Cabrini Green, and Wild Onions etc.
Looking at Mancow personal life, he married Sandy Fernando; a former publicist in 2003. Muller has two twin daughter Ava Grace and Isabella Sofia. Muller has his own business of car dealership, together with his business partner Mark; who is his own brother.
As of 2017, Muller's estimated net worth is $10 million through which he finances his living and lives a lavish life.