Getty ImagesJacob SchneiderU.S. international Cole Campbell called up to Borussia Dortmund senior team amid injury crisisUSABorussia DortmundBundesligaUnion BerlinUnion Berlin vs Borussia DortmundCampbell, the 18-year-old American phenom, has been called up to the Borussia Dortmund senior team for match vs Union BerlinArticle continues belowArticle continues belowArticle continues belowUSYNT sensation Campbell called up to BVB senior teamBundesliga side in injury crisisBig opportunity for young AmericanArticle continues below