Michael B. Scanlon (November 1843 – January 18, 1929) was an Irish-American professional baseball manager. Scanlon served as manager for two major league teams; the 1884 Washington Nationals of the Union Association and the 1886 Washington Nationals of the National League. In 196 games as a manager, he won 60 games and lost 132 games for a .313 winning percentage. Born in Cork, Ireland, Scanlon died in 1929 in Washington, D.C.