In which league do the Boston Red Sox play?

Which team did the Florida Marlins defeat in the 2003 World Series? Which team did the Anaheim Angels defeat in the 2002 World Series? In which league do the New York Yankees play? In which league do the Los Angeles Dodgers play? In which league do the Chicago Cubs play? In which league do the Chicago White Sox play? In which league do the St. Louis Cardinals play? In which league do the Houston Astros currently play?