Jordan Zimmermann pitched well in a no-decision, yielding one run in seven innings of work as the Nationals lost to the Cubs on Tuesday.
Bryce Harper belted his 17th home run of the season in a losing effort against the Cubs on Tuesday.
Anthony Rendon (knee, oblique) played three innings Tuesday in a simulated game.
In his first start back in the Nationals' rotation, Tanner Roark fired five innings of one-run ball in a 2-1 win over the Cubs on Monday.
Drew Storen struck out one batter in a scoreless ninth inning Monday against the Cubs for his 15th save of the season.
Wilson Ramos launched a go-ahead solo home run against the Cubs on Monday.
Denard Span smacked a leadoff homer Monday against the Cubs.
Nationals pitching prospect Paolo Espino looked sharp in Sunday's win for Triple-A Syracuse, allowing just four hits over seven shutout innings.
Anthony Rendon (knee, oblique) is set to begin playing in simulated games on Monday.
Doug Fister (forearm) said Sunday that he is feeling better and hopes to begin throwing soon.
Nationals released 1B/OF Kila Ka'aihue.
Drew Storen worked a scoreless ninth inning for his 14th save as the Nationals wrapped up a 4-1 victory over the Phillies on Sunday.
Gio Gonzalez picked up his fourth win of the season after holding the Phillies to a lone run in 6 1/3 innings of work on Sunday.
Bryce Harper went 2-for-3 with a walk and two RBI as the Nationals beat the Phillies on Sunday.
Jayson Werth's left wrist remains too swollen to allow him to resume baseball activities.