Hugh Duffy (November 26, 1866 - October 19, 1954) was a 19th century Major League Baseball player.
Duffy entered the National League with the Chicago White Stockings in 1888 and shortly thereafter earned the reputation of an outstanding outfielder and powerful hitter. He switched leagues, joining the American Association's Boston Reds in 1891; he then returned to the NL with the Boston Beaneaters in 1892, where he enjoyed his best seasons. Playing in Boston from 1891 until 1900, Duffy knocked in 100 runs or more 8 times. In 1894 Duffy had one of the greatest seasons in baseball history, leading the league with 18 home runs, with 145 RBI and a .440 batting average (see Triple crown). Duffy's .440 average is the Major League single season batting average record. He worked throughout his career with some of the all-time better outfielders including Tommy McCarthy as half of the "Heavenly Twins", Chick Stahl as well as hall-of-famer Billy Hamilton.
Duffy finished his career in 1906 with 106 home runs which was, at the time, one of the highest career totals ever. However, in 1906, Hugh Duffy only got to play once.
Duffy was inducted into the Baseball Hall of Fame in 1945.