(Christopher Hanewinckel/USA TODAY Sports)

PFF: Buffalo Bills have NFL's sixth best secondary

The Bills secondary were ranked among the league's elite by PFF.

The Buffalo Bills had one of the best outside cornerback combinations in the league last year. However, Buffalo's secondary is more than just the tremendous pairing of Stephon Gilmore and Ronald Darby. Buffalo has a talented safety duo in Aaron Williams and Corey Graham and solid depth options at both cornerback and safety. 

Considering the amount of talent the Bills have in their secondary, it shouldn't come as a surprise to see Pro Football Focus rank Buffalo's secondary among the league's elite. PFF had the Bills ranked sixth among most talented secondaries.

6. Buffalo Bills

Projected starters: CB Ronald Darby, CB Stephon Gilmore, SCB Nickell Robey, S Corey Graham, S Aaron Williams

Other names to know: CB Sterling Moore, CB Corey White, S Robert Blanton

Key stat: Darby and Gilmore were each targeted once every 5.1 snaps in coverage, tied for the fourth-most frequent rate in the league last season.

Darby had a stellar rookie season that led to him winning our Defensive Rookie of the Year award. On the opposite side of the field, Gilmore has put together back-to-back solid seasons in coverage in two different defensive schemes. The biggest question for the group at this point is what to expect from Robey going forward, or if Sterling Moore can beat him out for the No. 3 spot on the depth chart. Robey had an impressive rookie season a couple years ago, but his performance has since dipped, as he ranked 90th in overall grade out of 111 qualifying cornerbacks in 2015. Aaron Williams should also be a welcomed return if he doesn’t have any adverse effects from his neck injury.

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