The Philadelphia Eagles' quarterback situation is in flux again after Michael Vick re-injured his left hamstring and left Sunday's game.
Rookie third-string quarterback Matt Barkley replaced Vick, and the Eagles lost 15-7 to the New York Giants.
Vick pulled his hamstring three weeks ago and missed the previous two games. He returned Sunday after Nick Foles was ruled out with a concussion. Vick practiced all week.
"I felt good going in. I felt like I did everything that I was supposed to do to reassure myself that I could go out and play," Vick said. "But there's just nothing like actually being in the moment and having to move and having to react. When I did that, that's when I pulled it again. I felt the pop."
Eagles coach Chip Kelly refused to second-guess his decision to start Vick.
"How he felt, what we were hearing from Mike and what we were hearing from our trainers and the doctors (was) that he felt like he was pretty good," Kelly said. "When it was originally diagnosed, it was supposed to be 10 to 14 days. It was actually 21 days until we played. So he felt good about it. Our training staff and doctors felt good about it. We as a coaching staff didn't see any effects in terms of him doing anything from a practice standpoint. Felt like he was going to be the number one guy."
Kelly was uncertain who would be under center when the Eagles play the Raiders next Sunday in Oakland.
"(Foles) still hasn't been cleared to fully practice, so that's a big question mark going into next week," Kelly said. "I really don't know (who will start next Sunday). It really depends on the full report on Mike and the full report on Nick."
Before leaving Sunday's game, Vick completed six of nine passes for 31 yards with an interception. He was also sacked once drew an intentional-grounding penalty. The interception occurred on the Eagles' third offensive play from scrimmage.
Barkley completed 17 of 26 passes for 158 yards with one interception.
Vick is 2-4 as the Eagles' starter this season. Philadelphia went 1-1 in Foles' starts.
"I think when you're unsettled at that (quarterback) position in this league, it's real difficult," Kelly said.