Calvin Robertson Griffith, born Calvin Griffith Robertson, was a Canadian-born American Major League Baseball team owner. As president, majority owner and de facto general manager of the Washington Senators/Minnesota Twins franchise of the American League from 1955 through 1984, he orchestrated the transfer of the Senators after 60 years in Washington, D.C., to Minneapolis–Saint Paul in the autumn of 1960 to create the Twins. He was famous for his devotion to the game and for his sayings. He was the last MLB owner who had no income apart from his franchise.