Vintage baseball doubleheader

Please note: This event has already occurred.
What was baseball like in the 1860s? Imagine today's game, but with only underhand pitches, no outfield fences and trees or other obstacles in the field of play, and you'll start to get a picture of the game's origins. So the Chesapeake and Potomac Vintage Baseball Club's doubleheader, from 10 a.m. to 2 p.m., isn't quite the polished, powerful homerun derby that's on display at Nationals Park, but a rare history lesson on the field of play.