Van Orden tossed his first career shutout to guide Duke to a 6-0 win over Georgia Tech in the ACC Tournament.
The source also said the Nationals have agreed to terms with at least 12 other Draft picks, but none higher than Orden at No. 5.
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.