Treinen was held out of Monday's game against the Cardinals because of recent heavy use, Mark Zuckerman of MASN reports.
Treinen has struggled to open the season, with two blown saves and three runs allowed in just four appearances. Still, the Nationals remain confident in the youngster, and he remains the closer going forward. Manager Dusty Baker said Treinen will be ready to go Tuesday and should be expected to take the ball when the Nationals next face a save situation.