The Boston Celtics share their arena with the Boston Red Sox.
Boston Celtics . The Celtics play their home games at the TD Garden , which they share with the National Hockey League ( NHL ) 's Boston Bruins . Fenway Park . Since 1912 , it has been the home for the Boston Red Sox , the city 's American League baseball team , and since 1953 , its only Major League Baseball ( MLB ) franchise .