Bob Carpenter is an American sportscaster and current television play-by-play announcer for Major League Baseball's Washington Nationals on MASN. He was born in St. Louis, Missouri, and graduated from William Cullen McBride High School. Carpenter attended the University of Missouri-St. Louis, and later graduated with honors from the University of Missouri-Kansas City with a bachelor's degree in Radio-TV-Film.

The Washington Nationals are an American professional baseball team based in Washington, D.C. The Nationals compete in Major League Baseball (MLB) as a member of the National League (NL) East Division. From 2005 to 2007, the team played in RFK Stadium while a new stadium was being built. In 2008, they moved to Nationals Park, located on South Capitol Street in the Navy Yard neighborhood of the Southeast quadrant of D.C., near the Anacostia River.