D'Arnaud (undisclosed) will be seen by Mets doctors Friday, Adam Rubin of ESPNNewYork.com reports. D'Arnaud is out of the lineup for Game 1 of Thursday's doubleheader and will presumably be unavailable for both games of the twin bill. The team still has not disclosed the nature of the injury, but manager Terry Collins said he's unsure whether d'Arnaud will play at all this weekend.