Proudly wave your Nationals World Series flag to celebrate their World Series victory. Be sure to browse our extensive selection of official Nationals World Series Champions flags, including WS banners, garden flags and more here at the MLB Shop. Decorate your home with colorful Washington Nationals house flags and garden flags. Adorn your game room or man cave with giant Washington Nationals banners and unique pennants. Take your team pride with you on-the-go and add a Washington Nationals car flag. Visit the MLB Shop for all your Washington Nationals flag and banner needs.