Starter Michael Vick sat out his third straight practice Friday as he continues to recover from broken ribs and has been ruled out by the Eagles, according to the source. Vick isn't ready to return in a starter's capacity, the source said, meaning that he could physically play but the team is being cautious with the injury to ensure he will be at full strength in December.
Officially, Vick was questionable on the team's Friday injury report, and one league source said he'd be "shocked" if the quarterback played. But Vick is improving and is a good bet to start the team's Thursday night game in Seattle on Dec. 1.
Young will not have the services of wide receiver Jeremy Maclin, who will not play because of his injured hamstring, a league source told NFL Network's Stacey Dales. Wide receiver DeSean Jackson is listed as probable and expected to play after taking part in limited portions of practices on Thursday and Friday.
Asante Samuel will start at one cornerback spot Sunday. If Asomugha can't play, the other healthy cornerbacks on the roster are veteran Joselio Hanson, who has started 18 games for the 49ers and Eagles since 2003; Brandon Hughes, originally a fifth-round pick of the Chargers in 2009; and rookie third-round pick Curtis Marsh.