Thompson struck out two in a clean sixth inning in his season debut Friday against the Nationals.
Thompson was called up Friday to give the Phillies' bullpen some additional depth after the team's relievers averaged 4.5 innings per game during their most recent road trip. His current stay in the majors is unlikely to be lengthy as the Phillies want to keep him in a starting role, but they are without an opening in their rotation at the moment.