Rupp is not in the lineup for Tuesday's matchup with the Pirates, Matt Gelb of the Philadelphia Enquirer reports.
Rupp has been the primary catcher for much of the season, but the Phillies are hoping to get catching prospect Jorge Alfaro into the lineup more down the stretch, so Rupp will take Tuesday's game off to comply. The 27-year-old will likely see a few more days off in the next few weeks in order to give Alfaro more time to show his skills.