William Wright Regan (January 23, 1899 – June 11, 1968) was an American professional baseball second baseman. He played in Major League Baseball (MLB) from 1926 to 1931 for the Boston Red Sox and Pittsburgh Pirates. Basically a line drive hitter and smart baserunner, Regan had good contact and was able to convert his gap line drives into extra bases. In 1927 he recorded career-numbers with 37 doubles and 10 triples, while hitting .274 in 129 games. Regan died in his homeland of Pittsburgh, Pennsylvania, at the age of 69.