Strasburg has been out with a strained back muscle and will pitch for the first time since May 31 against Atlanta. He left that game after two innings.
Strasburg is 3-5 with a 2.54 ERA in 12 starts. The Nationals shut down the 24-year old ace last September, a year after he had Tommy John surgery. Strasburg pitched 159 1/3 innings and didn't appear in the postseason.
Left-hander Xavier Cedeno, who had no record and a 9.39 ERA in seven relief appearances, has been optioned to Triple-A Syracuse.