It likely means that Strasburg will pitch Game 1 of the NLDS, followed by Zimmermann, who will pitch in Game 2. Right-hander Doug Fister will likely pitch Game 3, followed by left-hander Gio Gonzalez for Game 4, if necessary.
The Nationals have not officially announced their rotation for the NLDS.
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.