Realmuto is out of the lineup for the first game of Thursday's doubleheader versus Atlanta.
Rafael Marchan will handle catching duties for the first game of the day, but Realmuto should be back behind the dish for the nightcap, when he'll form a battery with right-hander Zack Wheeler. Realmuto had started in each of the Phillies' previous four games and went 2-for-17 at the plate, bringing his batting average down to a career-low .228 for the season.