Grace was recalled from Triple-A Syracuse on Wednesday, Dan Kolko of MASN Sports reports.
With Joe Blanton (shoulder) landing on the disabled list, a spot opened up for the well-traveled southpaw to head back to the big leagues. Grace struggled a bit in his first cup of coffee with the Nationals, allowing three runs in 4.1 innings pitched, so he'll look to improve upon that in his upcoming tenure in the nation's capital.