Atlanta ? The Atlanta Falcons already have a model for surviving without standout quarterback Michael Vick, who will be out at least six weeks with a broken leg.

Last year, the Philadelphia Eagles won five of their final six regular-season games after quarterback Donovan McNabb went down with a similar injury. McNabb returned for the playoffs and led Philadelphia to the NFC Championship game.

Can the Falcons match that success?

“We still have a lot of talent left, and a lot of people the last couple of years have been saying this team is all Mike Vick,” Atlanta defensive end Patrick Kerney said. “Now is the chance for us to prove them wrong.”

The Eagles actually lost two quarterbacks last season. Backup Koy Detmer started a 38-17 victory over the San Francisco 49ers, but dislocated his left elbow in the third quarter. He didn’t play the rest of the season.

Third stringer A.J. Feeley led Philadelphia to a 4-1 record down the stretch.

In Atlanta, backup Doug Johnson, who has started only three games in his career, takes over for Vick.

“We have a second-team quarterback who could probably start for every team in this league,” Falcons linebacker Keith Brooking said. “This is the ultimate team sport, and you find out what you’re about when faced with adversity.”

Vick was injured Saturday night during Atlanta’s 13-10 preseason loss to the Baltimore Ravens. Late in the first quarter, he was chased out of the pocket on a third-down play and was tackled by Adalius Thomas. Vick fell awkwardly on his right leg, and grabbed it even before he fell all the way to the ground.

After he was examined by the Falcons’ medical staff, Vick got up with some help and limped a few steps to a cart. The crowd gave him a standing ovation as he was driven to the locker room.

“He usually pops right back up,” Johnson said. “Every time he gets hit, he’ll kind of roll around and figure it out and get back up.

“When I saw him not get up, I knew he was hurt bad.”

If Vick is out six weeks, he’ll miss the first four games of the regular season and return Oct. 5 against Minnesota.

He fractured the fibula on the outside of his right leg, down near his ankle. A cast was placed on the leg Saturday night.

“The break is very clean. It’s not displaced at all,” said Dr. Andrew Bishop, the team’s orthopedist. “Typically, it takes six weeks for a bone to heal. … We don’t know. It could be eight or 10.”

If the bones stay aligned, Vick won’t have surgery.