Kevork Djansezian/Getty ImagesWhile we aren't even halfway through baseball season yet, it's already been quite a year for rookies in the majors. In the American League, Aaron Judge is setting a new standard for power hitters and giving Yankees fans hope that they've found another fresh-faced franchise player that will be with them for years to come. But as impressive as Judge's numbers are, Dodgers' rookie Cody Bellinger is debatably showing an even greater aptitude for slugging with the best in the world. Bellinger was called up in April after Joc Pederson went down with an injury.