1930s Washington Nationals Full Size Pennant Rare Variation Vintage MLB Senators1930s Washington Nationals full sized pennant The Washington baseball team was officially named the "Senators" during 1901 1904, the Nationals during 1905 1955 and the Senators again during 1956 1960, but nonetheless was commonly referred to as the Senators throughout its history. The name "Nationals" appeared on the uniforms for only two seasons, and then was replaced with the "W" logo. However, the names "Senators," "Nationals" and shorter "Nats"