"This is part of his developmental program," Rizzo said. "He is doing what pitchers do in between starts. He is on an innings limit, but we want him to get through an entire season -- to feel what it's like to pitch at the end of August.
Giolito is off to a good start for Class A Hagerstown, going 2-0 with a 2.51 ERA and 36 strikeouts in 32 1/3 innings.
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. Daniel Popper is an associate reporter for MLB.com. He also can be found on Twitter @danielrpopper. This story was not subject to the approval of Major League Baseball or its clubs.