The Cask 'N Flagon is a restaurant and sports bar with locations at Fenway Park in Boston and on RT. 139 in Marshfield, MA. Both locations are owned locally. ESPN has rated it "Top Baseball Bar in America." The bar/restaurant began as a small neighborhood bar known as Oliver's over forty years ago. What was once known as the little bar on the corner of Brookline Avenue is now a landmark location for diehard Boston sports fans, college students, locals and tourists.