Nationals manager Blake Butera said Wednesday that Irvin (shoulder) will be activated from the 60-day injured list to start Thursday's game in Atlanta, Kyle Williams of TheBanner.com reports.
Irvin has been shelved since late May while working his way back from a right shoulder strain. He pitched well in three rehab starts, covering 11.1 shutout frames with a 12:1 K:BB and just two hits allowed. Irvin authored a 5.23 ERA in 11 starts before getting hurt, however, so his leash on a rotation spot with Washington may not be long.