"I'll put a little covering on it and it should be completely healed in the next couple of days," McLouth said.
McLouth is off to a slow start, going 6-for-56 (.107) entering Wednesday's action, but he is fourth on the team in walks with 10, which is an indication that he is seeing the ball pretty well.
"I wouldn't say I have swung the bat well, but my at-bats haven't been awful," McLouth said. "I have a lot of walks. I finally [got some hits] through the hole the last couple of nights, but I'm OK."
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.