GLENDALE, Ariz. – Miguel Rojas has a lot to think about.The 24-year-old infielder knows that he needs to hit better to become a major-league player. Last year at Double-A Chattanooga, his first season in the Dodgers' organization, Rojas batted .233. That's enough to leave anyone, even the best defensive second baseman in camp, buried on a long list of non-roster invitees.