Worst player on each NFL team 2015

#4. Buffalo Bills: Preston Brown

PFF grade (position rank): -38.2 (94th)
2015 salary cap hit: $702,000

One year after the Bills assembled a consensus top-five defense under former coordinator Jim Schwartz, head coach Rex Ryan barged in and installed a new scheme that didn’t gel nearly as well as anticipated. Ryan’s scheme, which depends on forcing sacks and turnovers through complex blitz packages, didn’t accomplish its primary objective. The Bills ranked 31st in the league with 21 sacks and were in the middle of the pack with 23 turnovers.

Brown proved to be a particularly poor fit, ranking dead last in Pro Football Focus’ ranking of 94 qualified linebackers. He symbolized the alarming decline of Buffalo’s defense, not improving in any area after a promising rookie season under Schwartz.

The Louisville product didn’t record a single sack, allowed opposing receivers to catch 38-of-45 balls when he was targeted in pass coverage and was rated by PFF as the second-worst run defender among linebackers.