Penn Medicine Park is a baseball park located in Lancaster, Pennsylvania, in the Northwest Corridor neighborhood. It is the home of the Lancaster Stormers, the city's Atlantic League of Professional Baseball (ALPB) franchise. It hosted its first regular-season baseball game on May 11, 2005, with the Stormers losing to the Atlantic City Surf, 4–3. The ballpark also serves as the corporate headquarters for the Atlantic League and seats 8,000 people.