The Nationals reinstated Ruiz (illness) from the 10-day injured list Thursday.
Left-hander Robert Garcia is the second Nationals player to go on the injured list with the flu, joining catcher Keibert Ruiz.
Ruiz (illness) will begin a rehab assignment with Double-A Harrisburg on Tuesday, Andrew Golden of The Washington Post reports.
Ruiz (illness) indicated Sunday that he was almost fully recovered from the bout of the flu that landed him on the 10-day injured list, but he's expected to go on a short rehab stint before being activated, Mark Zuckerman of MASN Sports reports.
April 15: Washington officially recalled Parker to start tonight’s game. The Nats also brought up catcher Drew Millas from Triple-A Rochester and placed Keibert Ruiz on the 10-day injured list, retroactive to April 12, because of the flu. Washington also reinstated Nick Senzel from his season-opening IL stint and optioned infielder Trey Lipscomb. April 14: The Nationals will call…