 In 1981, Sudduth first represented the United States at the Under 23 World Championships in the men's eight (8+) which finished second.Later that year, he again represented the United States in the World Rowing Championships, where his four-man boat (4+) finished second.Sudduth would go on to represent the United States in the four (4+) at the 1982 and 1983 World Championships, where his boat finished third and seventh, respectively.