Buffalo Bills defense from Leslie Frazier against Chargers The Buffalo Bills defense had the doors blown off in Week 1 against the Baltimore Ravens and more of the same was happening to them in Week 2 against the Los Angeles Chargers. So Sean McDermott did something he hasn't done in his 19 games as Bills head coach; he started calling plays.McDermott took over defensive play-calling in the second half Cheap Kelvin Benjamin Jersey , overruling defensive coordinator Leslie Frazier and providing a spark to a Bills defense that was able to lock it down over the final two quarters even without Vontae Davis and down to just two cornerbacks."I just thought we needed a spark and that's my background," McDermott said after the game. "Coach Frazier does a really good job as well as the defensive staff. I just felt like we needed a spark."Buffalo had allowed nine consecutive red zone touchdowns this season (ten if you count the 20-yard score from Sunday on the edge of the red zone) until McDermott's defense forced a field goal in the second half. After surrendering 28 points to Los Angeles and 47 points to the Ravens, Frazier's defense had allowed 75 points in only six quarters. Buffalo's 78 points allowed after two games is tied with the Detroit Lions for worst in the NFL. "Defensively, we didn't play well enough, obviously Cheap Dion Dawkins Jersey , in the first half against a good offensive unit, spotting them 28 points," McDermott said.The Bills defense gave up 17 first downs to Phillip Rivers and the Chargers in the second half on the heels of 26 first downs a week ago to the Ravens. But McDermott, whose defense only gave up four first downs the rest of the way, doesn't know yet if it's going to be a permanent move."It's something we're going to evaluate Cheap Shaq Lawson Jersey ," McDermott said. "We're going to evaluate that as well as a few other things, too." The Buffalo Bills will be without their two best quarterbacks this Sunday, as it's highly unlikely Josh Allen or Derek Anderson will be able to play due to injuries. Nathan Peterman will start in their place and newly-signed Matt Barkley will presumably be the backup.Anderson suffered a concussion in Monday night's game against the New England Patriots. He wasn't even on the field doing light non-contact work, so he is still far the field. He would need to participate in conditioning work before being able to do full contact, passing all the tests along the way. It's highly unlikely that will happen by Sunday.Allen Bills Vladimir Ducasse Jersey , meanwhile, is dealing with a sprained elbow ligament. Head coach Sean McDermott gave the first bit of meaningful comments on his rookie quarterback's return today, saying Allen "isn't too far off" from throwing the football. Whether that means he sees the field next week against the New York Jets or in a few weeks after the bye is still undetermined.ALso in the concussion protocol is rookie linebacker Tremaine Edmunds. Unlike Anderson, Edmunds was on the field doing light work today. If he passes the neurological tests today and can participate in practice and pass tomorrow's tests, he could actually suit up Sunday. It's still more likely than not that he misses the game Authentic Stephen Hauschka Jersey , but the door is at least open.Defensive end Trent Murphy missed practice on Wednesday and Thursday this week and has been out since leaving the game against the Indianapolis Colts on October 21st. He's labeled as "week to week" with his knee injury. He's unlikely to suit up.Limited in practice Thursday were Kyle Williams and Lorenzo Alexander. The 35-year-olds have been given rest days all season. We expect both of them to play on Sunday at this point.For the Chicago Bears, Khalil Mack didn't practice Wednesday and our affiliate Windy City Gridiron thinks they might give him the week off because Buffalo's offense is so bad. That would be disappointing considering he played his collegiate football at the University at Buffalo. Wide receiver Allen Robinson is dealing with a groin injury and tight end Eric Kush has a neck stingers. Lineman Kyle Long is going to be out.