PHILADELPHIA -- Philadelphia Eagles quarterback Nick Foles has a concussion, coach Chip Kelly confirmed Monday, leaving the team with an even more uncertain situation at the most important position in football.
Foles' availability will be determined by the NFL's concussion protocol. He must pass tests to show he has returned to baseline cognitive function, then be cleared by an independent neurologist.
Meanwhile Michael Vick, who won the starting quarterback job in training camp, must decide whether the hamstring he injured Oct. 6 is healed enough for him to play.
Kelly could not say who would be taking first-team snaps when the Eagles (3-4) resume practice Tuesday, let alone who will start Sunday against the New York Giants.
"I don't know until we get here and run around a little bit [Tuesday] morning," Kelly said. "Tomorrow is a lifting day, so they'll lift before we get out onto the field. Mike was in for treatment. Nick was here. So we'll make a determination when we get to tomorrow."
Even after Foles' poor performance in Sunday's 17-3 loss to the Dallas Cowboys -- he completed 11 of 29 passes for 80 yards in three scoreless quarters -- Kelly still declined to say who his No. 1 quarterback is.
"My decision on who our quarterback is is based on health," Kelly said. "Right now, I don't who's healthy or who's not healthy. Until we find out who's healthy, it doesn't help anybody to say, 'That guy's our starter.' It doesn't help the situation."
Rookie Matt Barkley is the only healthy quarterback on the Eagles' roster. He played the fourth quarter against Dallas in place of Foles and threw three interceptions.
Kelly acknowledged there is a chance Barkley could start against the Giants and that the Eagles would have to add a quarterback to their roster.
"If those guys can't go, obviously we'd have to bring in another quarterback," Kelly said.
Vick has been listed as day-to-day since pulling his left hamstring in the first half of the Eagles' Oct. 6 victory over the Giants at MetLife Stadium. He was active for the following week's game at Tampa Bay but inactive Sunday.
That had more to do with the availability of tight end James Casey, who is the team's emergency third quarterback. Casey missed the Buccaneers game with a groin injury but was active against Dallas.
Last week, Vick said his injury was improving but that it was more serious than he'd realized. On Sunday, he worked out before the game.
"He said it feels it's moving in the right direction," Kelly said. "It will be interesting to see where he is from a standpoint of running around a little bit tomorrow morning."
As for Foles, Kelly said he spoke with him after Sunday's game.
"He seemed like he's doing well," Kelly said. "But all that stuff, and rightly so, there's a protocol and a system he goes through."