The Boston Red Sox are a professional baseball team based in Boston, Massachusetts, and are a member of Major League Baseball's American League East division. Founded in 1901, they have a storied history marked by periods of both triumph and tribulation, most notably the "Curse of the Bambino" which plagued them for 86 years. The Red Sox have won nine World Series championships, including four since breaking the curse in 2004. They play their home games at Fenway Park, the oldest ballpark in MLB, known for its iconic Green Monster left-field wall. With a passionate fanbase, the Red Sox are a beloved institution in New England and beyond.