Silverio, 24, hit .306 with 16 home runs and 85 RBIs last season with Double-A Chattanooga and was selected to the XM All-Star Futures Game.
Van Slyke, 25, the son of former Major Leaguer Andy Van Slyke, won the Southern League batting title with a .348 average. He had 20 home runs and 92 RBIs at Chattanooga, earning him the franchise's Minor League Player of the Year Award.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.