The Boston Red Sox are an American professional baseball team based in Boston. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) East division. Founded in 1901 as one of the American League’s eight charter franchises, the Red Sox’ home ballpark has been Fenway Park since 1912. The team has won nine World Series championships, tied for the third-most of any MLB team, and has played in 13 World Series. Their most recent World Series appearance and win was in 2018. In addition, they won the 1904 American League pennant. The Boston Red Sox were a dominant team in the new league, defeating the Pittsburgh Pirates in the first World Series in 1903 and winning four more championships by 1918. However, they then went into one of the longest championship droughts in baseball history. The Sox endured an 86-year wait before the team’s sixth World Championship in 2004. Following their victory in the 2018 World Series, they became the first team to win four World Series trophies in the 21st century. The Boston Red Sox are consistently one of the top MLB teams in average road attendance, while the small capacity of Fenway Park prevents them from leading in overall attendance. From May 15, 2003, to April 10, 2013, the Red Sox sold out every home game—a total of 820 games for a major professional sports record. As of the end of the 2022 season, the franchise’s all-time regular-season record is 9,796 – 9,098.