When the Buffalo Bills' defense was ranked fourth in the NFL under then-coordinator Jim Schwartz in 2014, one of its hallmarks was a defensive-line rotation that included a fresh, second wave of players capable of giving tired offensive lines headaches.
The Bills' new-look 3-4 scheme under Rex Ryan this season is drastically different from Schwartz's system, but its defensive-line group is already showing signs of being similarly deep and effective.
In 2014, the Bills' front line was headlined by three Pro Bowlers -- Mario Williams, Kyle Williams and Marcell Dareus -- along with rising pass rusher Jerry Hughes.