The Washington Redskins will face a rookie quarterback, Nick Foles, when they host the Philadelphia Eagles on Sunday at FedEx Field, barring a last-minute change of plans by the Eagles, a person familiar with the situation said Monday evening.

The person, speaking on the condition of anonymity because the Eagles have not officially announced Foles as their starter, said it appears that veteran quarterback Michael Vick will be sidelined by a concussion and Foles will take over as the starter, confirming reports by several media outlets earlier Monday.

“It does seem like it will go that way,” the person said.

Foles replaced Vick during Sunday’s loss to the Dallas Cowboys. The defeat extended the Eagles’ losing streak to five games and left them in a last-place tie with the Redskins in the NFC East, at 3-6.

It would be Foles’s first NFL start. The third-round draft pick from Arizona completed 22 of 32 passes for 219 yards and a touchdown in his relief outing against the Cowboys, but had an interception and a fumble that each resulted in a Dallas touchdown.

Eagles Coach Andy Reid said at a news conference earlier Monday that Vick had a “pretty good” headache and was tired. Vick had suffered a “pretty significant” concussion, Reid said.

Reid said that Vick would be subject to the league’s concussion protocols, which require him to be cleared by an independent neurologist before he can play again. Reid said Vick’s playing status for this week was unclear and he did not announce which quarterback would start Sunday against the Redskins.

“I think we’ll know here in the next couple of days,” Reid said. “I think we’ll have a pretty good idea. The thing I’m telling you now is I think it’s a pretty significant concussion there.”

Reid said he’s confident that Foles will play well if given the starting nod.

“Listen, Michael’s our quarterback so I don’t want to slight that part,” Reid said. “At the same time, I’ve got confidence that Nick will do a nice job if given that opportunity. Listen, I get excited for every game. But if the kid has an opportunity to start, I’m excited to see him play.”

Redskins Coach Mike Shanahan said earlier Monday that his team would make preparations to face either quarterback.

“Obviously we have to get ready for both,” Shanahan said following his team’s practice Monday afternoon at Redskins Park. “We’re not sure what the situation is. So we’ll kind of wait and see there. With the concussion that [Vick] had, I don’t think they’re really sure.”

Linebacker Lorenzo Alexander said the Philadelphia offense will remain dangerous no matter which quarterback starts, given the presence of tailback LeSean McCoy and wide receivers DeSean Jackson and Jeremy Maclin.

“You’ve got to prepare for whoever is out there,” Alexander said. “They have other weapons—D-Jackson on the outside. They’ve got Maclin, McCoy—all great athletes who can make plays at any time. So we’ve got to worry about those guys and if [Vick] plays, be ready for him as well.”