Reds left-hander Aroldis Chapman has been placed on the disabled list after an MRI revealed inflammation in his pitching shoulder. Cincinnati believes the problem contributed to his wildness in his last few appearances. Chapman walked 12 batters and retired only four in his last four outings. "It was affecting his mechanics," Reds manager Dusty Baker said. "You can see the last few outings, he hasn't been the same. He really hasn't complained, either."