Palmquist will serve as the Nationals' opening pitcher for Tuesday's game against the Phillies, Mark Zuckerman of NatsJournal.com reports.
Palmquist hasn't covered more than 3.1 innings in any of his prior five opener assignments, so that workload likely represents the upper range of what he'll handle Tuesday. Zack Littell is slated to pitch in bulk relief behind Palmquist and is the Nationals pitcher most likely to qualify for a win.