D'Arnaud (shoulder) suffered a setback Saturday, as he experienced discomfort when he tried to throw for the first time and had to be shut down, Newsday's Marc Carig reports.
Manager Terry Collins said Saturday's development was "pretty discouraging," and while d'Arnaud had already started hitting Thursday, he's clearly not ready to work on the defensive aspect of his rehab. He will continue hitting for now, and more information regarding a timetable for further activity should become available in the coming days, but Collins' comments suggest that d'Arnaud won't be returning soon. Kevin Plawecki should remain the primary catcher for the Mets for the foreseeable future.