Palmquist will serve as the Nationals' opening pitcher in Friday's game against the Yankees, Spencer Nusbaum of The Athletic reports.
Zack Littell is poised to absorb most of the workload in bulk relief, but Palmquist will take the ball first. The left-hander has made four appearances for the Nationals, allowing five runs with a 7:2 K:BB over 6.1 innings.