• Third baseman Ryan Zimmerman, on the disabled list since April 13 with a right thumb fracture, still hasn't progressed to being able to work on strengthening the thumb, according to Williams. Zimmerman is likely about a week away from that point, although Williams couldn't be sure of his progress until doctors evaluate X-rays of the thumb that were scheduled to be taken on Monday.
• Before Monday's series opener against the Dodgers, Williams still was not ready to name a starting pitcher for Tuesday night's contest. The Nats could use a reliever such as left-hander Ross Detwiler or call up a pitcher from the Minor Leagues.
• Catcher Jose Lobaton was out of the lineup for a second straight day on Monday with shin soreness. Lobaton was hit by a pitch there on Saturday, and Williams said the area remained swollen on Monday, although Lobaton was well enough to be available off the bench.
Andrew Simon is a reporter for MLB.com. Follow him on Twitter @AndrewSimonMLB. This story was not subject to the approval of Major League Baseball or its clubs.