The Royals have placed closer Joakim Soria on the disabled list due to continued shoulder soreness. In a related move, Kansas City called up right-hander Luke Hochevar from Class AAA Omaha. Hochevar will start against the Athletics on Tuesday, meaning veteran Sidney Ponson will shift to the bullpen. "We've been going day to day (with Soria) as you well know," manager Trey Hillman said. "It's a little bit of a strain in the rotator cuff that he's going through."