It’s summertime in North America, and for many Americans the hot days of August mean it's time for baseball. Reporter Mike Osborne recently found a game under way in a Nashville, Tennessee, park. But it was not the game he remembered playing as a child. It's Vintage Base Ball, played by the rules that governed the sport in 1864, when it was still spelled as two words. A recent but growing phenomenon, vintage teams can now be found in about half of the American states.