The Chargers have clearly placed an emphasis on adding more offensive line depth before the start of the 2015 season. They have already signed OL Orlando Franklin to a five-year deal and also brought in C Trevor Robinson on a two-year agreement.
Hairston, 25, is a former fourth-round pick of the Bills back in 2011. He played out his four-year, $2,455,908 contract with the Bills that included $415,908 guaranteed and is now an unrestricted free agent.
Last year, Hairston appeared in 10 games for the Bills and played a total of just 38 snaps, according to Pro Football Focus.