"No headaches at all," Cain said. "I'm ready to go." "I'm done," Cain said following the Royals' 9-7 loss to the Angels on Friday night. "They shut me down." In the fifth game of the season at Oakland, Cain sustained a left groin strain when banging into the wall making a catch. Greinke, dealt by the Royals in a major trade after the 2010 season, was moved by the Brewers to the Angels on July 27 because he's coming up on free agency. "I've known Zack a little bit.