In Ryne Harper's Nationals debut, the right-hander tossed two scoreless innings and recorded four strikeouts.
Stephen Strasburg was slated to start Saturday's game against the Yankees, but was pulled due to a nerve issue in his right hand.
Kyle Finnegan pitched a shutout ninth inning in his major league debut in the Nats' 9-2 win over the Yankees.
Max Scherzer gave up four runs, six hits and four walks while striking out 11 over 5 1/3 innings in the Nats' 4-1 loss to the Yankees on Opening Day.