Irvin (shoulder) is slated to face live hitters in batting practice Wednesday, Mark Zuckerman of NatsJournal.com reports.
If all goes well during Irvin's upcoming throwing session, he could be cleared to head out on a rehab assignment coming out of the All-Star break. Irvin has been shelved since May 24 due to a right shoulder strain and will likely require multiple starts in the minors to build up his pitch count before re-entering the Washington rotation.