The Orioles have demoted rookie Zach Britton to Double-A Bowie. Britton won five of his first six starts to emerge as an American League Rookie of the Year candidate. The move could not only extend his season, but also could gain the Orioles an extra year of the pitcher's service time. He is 6-7 on the season with a 4.08 ERA in 18 starts. "I wasn't expecting it," Britton said. "Last night was a terrible outing, but I feel like if you base everything on that outing. I don't know. I feel like if I'm under a microscope that much, that's a lot of pressure for me when obviously I'm still trying to figure everything out at this level.