David Carpenter (shoulder) has resumed a throwing program.
Denard Span (back) will resume light workouts on Monday.
Nationals SS prospect Wilmer Difo contributed a career-high five hits in Sunday's win for Double-A Harrisburg.
Anthony Rendon clubbed his first home run of the season as the Nationals fell to the Mets on Sunday night in New York.
Jordan Zimmerman struggled in a losing effort against the Mets on Sunday, allowing five runs on six hits over his six innings of work.
Nationals SS prospect Trea Turner racked up four hits in Saturday's win for Triple-A Syracuse.
Wilson Ramos is not in the Nationals starting lineup for Sunday night's showdown against the Mets.
Nationals SS prospect Osvaldo Abreu collected four hits in Saturday's game for Low-A Hagerstown.
Bryce Harper went 2-for-4 with a pair of singles and a run scored in Saturday's loss to the Mets.
Joe Ross pitched a nice game against the Mets on Saturday, yielding two runs on four hits over 6 1/3 innings.
Gio Gonzalez gave up one run in just 4 2/3 innings Friday against the Mets.
Bryce Harper was ejected from Friday's game against the Mets in the 11th inning for arguing balls and strikes.
Yunel Escobar drove in the Nationals' only run of the night Friday against the Mets.
Denard Span (back) is expected to resume doing baseball activities soon.
Stephen Strasburg (oblique) will make another rehab start with Triple-A Syracuse on Monday.