Eagles beat writer Tim McManus answered a question about the Eagles QB situation:
I’m working under the assumption that Mark Sanchez will be the quarterback for the remainder of the season, including playoffs.
The original timetable for Nick Foles' recovery was 6-8 weeks. A recent check-up suggested that the fractured clavicle is healing normally. December 14 -- the day the Eagles host the Cowboys -- is exactly six weeks from when Foles sustained the injury. Eight weeks puts us at the regular-season finale in New York. Even if Sanchez has a bad day against Seattle, there's little incentive to rush Foles back. If inserted for the final game or two, he would have very little time to knock the rust off. And given the way he played before he got hurt, there's no guarantee that he would play better than Sanchez even if he were to round back into pre-injury form.
Although it's just one opinion, the timetable makes sense that this is now Mark Sanchez's job for the rest of the season. His very good performance in the Dallas game Thanksgiving should buy him at least a bad game against Seattle should it play out that way. After that, the Birds finish with the Redskins and Giants, which should give Sanchez a chance to bounce back, rather than putting a rusty Foles back in at that point.