-OF Luis Robert, Chicago White Sox: The 22-year-old Robert joins a formidable White Sox lineup after agreeing to a $50 million, six-year contract in January - ahead of his major league debut. The athletic Cuban slugger batted .328 with 32 homers, 92 RBIs and 36 steals over three minor league stops last season. -INF Carter Kieboom, Washington Nationals: Anthony Rendon's departure in free agency created an opening at third base for the Nationals, and the reigning World Series champions are looking to Kieboom to fill the role.