Michael Vick said he would have continued to play on Sunday had that been asked of him. If there is nothing else consistent about the Eagles starting quarterback - and pretty much there is nothing else consistent - it is that he always wants to keep playing football regardless.

Criticize whatever else you like, but Vick doesn't look for the sideline. He has to be taken out, and that is what Chip Kelly did in the second quarter of Sunday's dreadful 15-7 loss to the New York Giants.

Kelly let Vick remain in the game for one series after the quarterback reinjured his left hamstring, just as he did when the injury originally occurred three weeks earlier in the Meadowlands, but it was clear that Vick couldn't run. For some quarterbacks, that's no big deal. For Vick, it changes everything.

When Kelly took a deep breath and went with rookie Matt Barkley, Vick went to the bench and draped a towel over his head. He has been in the NFL long enough to know that it isn't a good sign when three weeks of rehabilitation come undone in just nine plays.

"I tested it many times, but there's nothing like game simulation when guys are coming at you and they are going to hit you," Vick said. "I just reacted the same way I would have if I was 100 percent healthy."

He scrambled away from pressure and ran out of bounds on the third play of the Eagles' third drive of the game. The hamstring popped like a violin string turned too tightly, and after that it was just a matter of how long Kelly would choose to stay with him.

"It was hurting," Vick said. "I can't question why it happened. I've never had a hamstring injury this bad, so I really don't know what to tell you."

He has never had a 33-year-old hamstring before, either, and that probably explains the problem. Most of the other injuries Vick has suffered during his time with the Eagles had to do with the nature of football, and would have happened to a 20-year-old as easily as a 30-year-old. Bruised ribs, a hand injury, a quadriceps bruise, a concussion. Quarterbacks get hit and quarterbacks get hurt.

Vick has yet to be hit either time his hamstring went on him, however, and he also was merely trying to avoid contact when he suffered groin strains in the first two games of the season. He isn't being broken by defenses, which can happen to anyone. He is breaking down, which is much more likely for a veteran who has played in 127 regular-season games.

This leaves Kelly with a difficult decision, particularly since he isn't awash in great quarterback options at the moment. Vick was the starter against the Giants because Nick Foles is out with a concussion, because Barkley is a rookie whom the organization might or might not like all that much, and because Vick had gotten himself to somewhere around 80 percent of his normal capability.

Kelly went with Vick, giving him almost all the practice work with the first-team offense, and hoped for the best. What did he get? Eight healthy plays and a reinjured quarterback on the ninth. That's far from the best.

"When you're unsettled at this position in this league, it's real difficult," Kelly said. "Right now, we're unstable at the quarterback spot and we are not playing well at the quarterback spot, and we lost our last two games because of it."