Eagles quarterback Michael Vick was visibly frustrated after the team's 24-23 loss to the 49ers on Sunday afternoon. It was Philadelphia's third straight loss following a season-opening win over St. Louis. The Eagles held a 23-3 lead at one point in the third quarter. "It's shocking. It's frustrating," Vick said, adding the Eagles need to have a "gut check. "Some people have it and some people don't, but we're going to find out who's got it." Eagles defensive tackle Cullen Jenkins added that it was unacceptable to give up such a significant lead. "It's unacceptable to give up a lead that size in the second half," Jenkins said. "If we don't win, we're just a bunch of talented people who haven't done anything, and there's a lot of teams like that."