Ask just about any knowledgeable Buffalo Bills fan what position is the strongest on the team and you'll hear "running back" as a response. The answer makes plenty of sense as the Bills led the league in rushing last season. Of course, Tyrod Taylor's 568 rushing yards played a role in this, but LeSean McCoy, Karlos Williams, and Mike Gillislee all had success on the ground.
Heading into 2016, the running back unit looks even stronger. First, Buffalo added Jonathan Williams in the draft. Some analysts felt that Williams would have been a day two pick if he had not injured his foot. In addition to Williams, Buffalo also added James Wilder Jr. and brought back Dan "Boom" Herron. Regardless of how it all shakes out at training camp, Buffalo should be four deep at running back entering 2016. For that reason, it's no surprise that Pro Football Focus listed the Bills in the Top 10 of their running back unit rankings at No. 8.
PFF said the following about Buffalo's backs:
8. Buffalo Bills
Starter: LeSean McCoy
Backup: Karlos Williams
Key stat: Karlos Williams’ elusive rating was third among rookies last season.
There might not be another backfield duo that complements each other better than the one in Buffalo. Karlos Williams proved as a rookie that he’s a talented downhill, between-the-tackles runner, while LeSean McCoy has cut his teeth with his work in space. The only question is how the carries will be split with Williams vastly out-grading McCoy last season.
Although some teams had multiple backups named, PFF only opted to discuss Karlos Williams behind McCoy. Teams with RB units ranked ahead of Buffalo included the Steelers, Buccaneers, Chiefs, Panthers, Vikings, Rams, and Jaguars.