Janssen said he was grateful to be following scouting reports and listening to a game caller like catcher Wilson Ramos.
"It felt good," Janssen said. "Obviously, I wish as a whole we played a little better. But it's good to get an inning in there, get my feet wet and be a part of this thing."
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.