The Nationals activated Irvin (shoulder) from the 60-day injured list Thursday.
Irvin is slated to rejoin the Nationals' rotation with a start Thursday in Atlanta. It will be his first outing at the big-league level since late May, as Irvin has been working his way back from a right shoulder strain. Irvin made three rehab starts and topped out at 58 pitches, so he will be limited from a workload perspective Thursday.