What is the name of the professional baseball team based in Washington DC which played at RFK Stadium and Nationals Park and for whom Melvin Dorta had his debut in 2006?
Melvin Dorta: Melvin A. Dorta (born January 15, 1982 in Valencia, Venezuela) is a retired professional baseball infielder. Melvin Dorta:  He made his Major League Baseball debut with the Washington Nationals on July 21, 2006. Washington Nationals: The Washington Nationals are a professional baseball team based in Washington, D.C. The Nationals compete in Major League Baseball (MLB) as a member club of the National League (NL) East division. Washington Nationals:  From 2005 to 2007, the team played in RFK Stadium; since 2008 their home stadium has been Nationals Park on South Capitol Street in Southeast D.C., near the Anacostia River.
Washington Nationals