In 2015, Zerdin auditioned for the tenth season of America's Got Talent, successfully earning a place in the live rounds of the contest, before eventually winning the finals on 16 September 2015. Alongside winning $1 million, Zerdin was given his own headline show in Las Vegas. Entitled "Mouthing Off", it ran for four months in 2016, between 14 May to 4 September, at Planet Hollywood, before closing due to low attendance figures. In 2019, Zerdin returned to partake in the programme's spin-off contest, America's Got Talent: The Champions, in January, and the spin-off contest, Britain's Got Talent: The Champions, in July later that year, but failed to reach the final of either show.