"We are assessing the situation," a baseball source said. "We will not have any course of action in place until we've gathered all the information."
Purke, a third-round selection in the 2011 First-Year Player Draft, has been hit by injuries ever since he joined the organization. He has dealt with shoulder problems for most of his professional career.
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.