In a defensive wrinkle, the Patriots used cornerback Devin McCourty at safety in their sub package, which they were in often against the Bills’ spread attack. McCourty had an interception in the fourth quarter. The 2010 first-round draft choice has had a tough season after making the Pro Bowl as a rookie and his time at safety sparks the question: Would the Patriots consider making it a more permanent switch? McCourty was injured on the Bills’ final drive (looked like his leg), so his status will be something to monitor in the days to come.