Grace struck out one in a shutout inning of work during Monday's Grapefruit League game against the Tigers.
The left-hander's had a solid spring to date, posting a 2.45 ERA and 0.92 WHIP over four appearances and 3.2 innings, but Grace remains a long shot to break camp in the Nats bullpen with Sammy Solis and Oliver Perez locked in as the top two southpaw relief arms.