Detwiler already missed his scheduled start Monday against the Giants because of a right oblique strain. Detwiler hurt himself last week against the Dodgers in Los Angeles while running the bases on a sacrifice bunt.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.