"No worries, it just precautionary," Williams said.
Meanwhile, outfielder Bryce Harper had a scheduled day off against the Marlins, but he was sent home early because of flu-like symptoms.
"He had a stomach issue, so we got him out of here," Williams said. "We made sure it didn't spread. He didn't feel real good this morning. He came in with a bad stomach."
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.