 Dioguardi's association with the International Brotherhood of Teamsters was a long one.He became acquainted with New York City Teamsters leaders Martin T. Lacey and John J. O'Rourke in 1934, when Dioguardi represented the employers in a trucking strike.Dioguardi was involved again with the Teamsters by 1954, when police suspected him of involvement in a protection racket run by several Teamsters locals aimed at trucking employers.