The team was founded in Washington, D.C. in as one of the eight original teams of the American League, named the Washington Senators from 1901 to 1904, the Washington Nationals from 1905 to 1955, and the Senators again from 1956 to 1960 but nonetheless was commonly referred to as the Senators throughout its history (and unofficially as the "Grifs" during Clark Griffith's tenure as manager from 1912 to 1920). The name "Nationals" appeared on uniforms for only two seasons, and then was replaced with the "W" logo. The media often shortened the nickname to "Nats" — even for the 1961 expansion team. The names "Nationals" and "Nats" were revived in 2005, when the Montreal Expos relocated to Washington to become the Nationals.