The Nationals outfielder aggravates his left knee, an injury he says he may have to deal with all season.

The second baseman will receive an MRI exam on Monday afternoon on his left shoulder, which has bothered him for the past week.

Michael Morse’s power has been lacking as he has played through a wrist injury, and the Nationals want him fully healthy for the stretch run and postseason.

Reliever Sean Burnett has experienced irritation in his left elbow and will rest for a couple days.