Robles was removed from Saturday's spring training game against the Astros due to a hamstring injury, Bobby Blanco of MASNSports.com reports.
Robles reportedly felt a knot in his hamstring pop up after he was hit by a pitch during Wednesday's game against Miami, and it seemingly became an issue again during Saturday's contest. The Nationals will take a closer look at Robles, and he will likely sit out until his hamstring gets back to 100 percent.