William Vincent Dwyer (1883–1946), known as "Big Bill" Dwyer, was an early Prohibition gangster and bootlegger in New York during the 1920s. He used his profits to purchase sports properties, including the New York Americans and Pittsburgh Pirates of the National Hockey League (NHL), as well as the Brooklyn Dodgers of the National Football League. He eventually was brought down by the U.S. government through legal actions, leaving Dwyer penniless at the end of his life in 1946.