 Complete the following phrase:  Boston was also the site of the first game of the first baseball World Series, in 1903. The Boston-New York baseball rivalry has existed since May 7, 1903: the Red Sox-Yankees rivalry, with the New York team then being known as the Highlanders, from their Upper Manhattan home field location. The 1903 World Series was played between the Red Sox then known as the Americans and the Pittsburgh Pirates, while the team still played at the Huntington Avenue Grounds the site is now a part of Northeastern University. The Sox won that series and eight more since then 1912, 1915, 1916, 1918, 2004, 2007, 