The term D.C. Ballplayers refers to the professional baseball team based in Washington, D.C., the Washington Nationals. The team is often referred to by its four-letter acronym, 'NATS'. The Washington Nationals are a Major League Baseball team that was founded in 1969 as the Montreal Expos. In 2005, the team moved to Washington, D.C. and became the Washington Nationals. The team has won four National League East Division titles since moving to D.C. and has made two World Series appearances.