As an artist, Marshall was the only American artist of 73 global artists to be chosen to design and paint a life-sized cow statue of the Tokyo installation of the international art exhibition of the "CowParade" in 2008. He is the designer and creator of "Producer’s Puzzle," the annual award given to the Broadway Global Producer of the year since its inception in 2012.
In September 2017, Marshall performed on the show Penn & Teller: Fool Us, but failed to fool the hosts.