The Boston Red Sox, a founding member of the American League of Major League Baseball in 1901, play their home games at Fenway Park, near Kenmore Square in the city's Fenway section. Built in 1912, it is the oldest sports arena or stadium in active use in the United States among the four major professional American sports leagues, encompassing Major League Baseball, the National Football League, National Basketball Association, and the National Hockey League. Boston was the site of the first game of the first modern World Series, in 1903. The series was played between the AL Champion Boston Americans and the NL champion Pittsburgh Pirates. Persistent reports that the team was known in 1903 as the "Boston Pilgrims" appear to be unfounded. Boston's first professional baseball team was the Red Stockings, one of the charter members of the National Association in 1871, and of the National League in 1876. The team played under that name until 1883, under the name Beaneaters until 1911, and under the name Braves from 1912 until they moved to Milwaukee after the 1952 season. Since 1966 they have played in Atlanta as the Atlanta Braves.