Ryan Zimmerman (hamstring) did some light throwing on Thursday afternoon.
Ian Desmond is not in the Nationals' starting lineup on Thursday against the Diamondbacks.
Steven Souza (shoulder) is expected to begin a rehab assignment Thursday with Low-A Hagerstown.
Tanner Roark was excellent on Wednesday, shutting the D'Backs out in seven innings, but was left with a no-decision.
Bryce Harper went 3-for-4 with a run scored as the Nationals defeated the D'Backs on Wednesday.
Anthony Rendon pinch-hit and lifted a walk-off RBI single to left field in the ninth inning of Wednesday's win over the D'Backs.
Nationals manager Matt Williams said Wednesday that he expects Ryan Zimmerman (hamstring) to return from the disabled list "sometime in September."
Anthony Rendon is not in the Nationals' lineup Wednesday.
Stephen Strasburg limited the Diamondbacks to one run and three hits over eight innings to win Tuesday and even his record at 10-10.
Ian Desmond had three singles and four RBI against the Diamondbacks on Tuesday.
Nate McLouth will undergo season-ending surgery Thursday to repair the labrum in his right shoulder.
Wilson Ramos is not in Tuesday's lineup against the Diamondbacks.
Jordan Zimmermann took a no-decision after allowing three runs in seven innings as the Nationals won in 11 innings against the D'Backs on Monday.
Wilson Ramos hit his sixth home run of the season, finishing 2-for-4 on the night, as the Nationals beat the D'Backs in 11 innings on Monday.
Adam LaRoche belted a walk-off solo home run in the 11th inning to help the Nationals defeat the D'Backs on Monday.