Harper is dealing with hamstring soreness, and he is feeling better than he did the previous two days, according to Williams. Span is dealing with back spasms, which have been occurring often. The last time the spasms occurred was Friday, and that forced Williams to scratch him from the lineup.
"He feels better today," Williams said about Span. "He played four in a row feeling great. It's just one of those things that crops up every once in a while."
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the Time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.