Harper (0-1) allowed one hit and two earned runs over a third of an inning, taking the loss in Saturday's 5-3 defeat to the Mets.

Harper was recalled from Triple-A Rochester on Thursday, Mark Zuckerman of MASNSports.com reports.

Harper was optioned to Triple-A Rochester on Tuesday, Matt Weyrich of NBC Sports Washington reports.

Harper was recalled from Triple-A Rochester on Tuesday, Dan Kolko of MASN Sports reports.

The Nationals optioned Harper to Triple-A Rochester on Sunday.

Harper has been recalled from Triple-A Rochester to serve as the 27th man in Saturday's doubleheader against the Mets, Mark Zuckerman of MASNSports.com reports.

Harper was optioned to Triple-A Rochester on Friday, Matt Weyrich of NBC Sports Washington reports.

The Nationals recalled Harper from Triple-A Rochester on Tuesday, Dan Kolko of MASN Sports reports.

The Nationals optioned Harper to their alternate training site Tuesday.

The Nationals recalled Harper from their alternate site Sunday, Jesse Dougherty of The Washington Post reports.