Escobar left the game and was replaced by Danny Espinosa, who went to second, while Anthony Rendon, who started the game at second, switched over to third.
"For now, he is day to day," Williams said. "He ran into a fan running into that ball. As he went to reach for it, he kind of leaned over with his upper body. The fence caught him at the waist and he hyperextended his neck a little bit. He is a little sore. So we'll see how he is tomorrow."
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.