Perry Fewell acknowledged he hasn’t kept track of Michael Vick’s legal troubles this summer.

The Buffalo Bills’ defensive coordinator has a good excuse.

In between practices at training camp in suburban Rochester, Fewell has spent most of the past three weeks sequestered in his St. John Fisher College dorm room focused solely on getting his veteran-depleted unit ready for the regular season.

“The Bills have consumed me,” Fewell said.

And he still has plenty of work to do.

The Bills (1-0) won’t be playing against Vick when they host the Atlanta Falcons (0-1) in their preseason home opener Friday. Instead, it will be journeyman Joey Harrington getting his second turn this preseason to show he’s capable of taking over.

Vick has been barred from joining the Falcons while the NFL investigates his role in a federal dogfighting conspiracy case. The quarterback and his representatives are currently attempting to strike a plea deal with prosecutors.

Fewell might not have an opinion on Vick, but he’s open to sharing concerns regarding his defense, which struggled despite a 13-10 preseason-opening win at New Orleans last week.

In two series against Saints starter Drew Brees, the Bills allowed 118 yards passing — and 142 overall — seven first downs and a field goal. It would’ve been worse had Buffalo’s special teams not blocked a field goal attempt on New Orleans’ opening drive.

“I do worry about it a little bit,” said Fewell, who lost three veteran starters — linebackers Takeo Spikes and London Fletcher, and cornerback Nate Clements — this offseason. “I thought we should be stronger in the pass game with some of the things they did.”

With or without Vick, Fewell understands the Falcons will present a strong challenge because of the team’s first-year head coach, Bobby Petrino. The two previously worked together as assistants with the Jacksonville Jaguars, before Petrino took over at Louisville.

“He’s a brilliant offensive mind,” Fewell said. “I expect that same type of fire and competitiveness. And he’ll want to put a lot of points on the board.”

Petrino’s offense hasn’t changed much even with the far less mobile Harrington taking over.

Harrington looked comfortable, going 6-of-9 for 88 yards in a 31-16 preseason opening loss to the New York Jets last week. The Falcons also got a strong showing from second-year running back Jerious Norwood, who had eight carries for 29 yards rushing and a touchdown while filling in for injured starter Warrick Dunn.

“We really haven’t changed anything, but we are just utilizing different parts of the offense,” Petrino said. “There are different parts that Michael was very good at, and we are still trying to improve on some things. But we are really just trying to improve on what Joey does best.”

The Falcons real problems rest with their defense, which is banged up and tends to struggle against the pass.

The Falcons are troubled by injuries. Besides Dunn (back), other starters not expected to play against Buffalo are star tight end Alge Crumpler (knee) and defensive tackle Rod Coleman (quadriceps). Norwood has been bothered by a stomach virus this week, while cornerback DeAngelo Hall is questionable because of back spasms.

Petrino remains upbeat, particularly with how his players have handled daily questions regarding Vick.

“I think our players have done a good job of keeping focus and allowing the distractions to not get the best of them,” he said. “We are going to continue to focus on the Buffalo game, and then the opener versus Minnesota. That’s all we can do.”

For Buffalo, Friday’s game will mark the home debut for budding rookies, first-round pick, running back Marshawn Lynch, and linebacker Paul Posluszny, a second-round selection.

Lynch, groomed to take over the starting job after the Bills traded Willis McGahee to Baltimore in March, will get more playing time this week after being limited to two carries for 3 yards last week.

Quarterback J.P. Losman is eager to see Lynch show fans the speed and versatility — he doubles as a receiver in certain situations — he’s displayed in training camp.

“He’s been exciting to watch in practice,” Losman said. “I don’t know why he only got a couple of snaps in the game. ... But I’m sure he’ll get a few more chances and people will get to see what he has to offer.”