'The decline in ability hasn't happened yet for Williams, and the Bills are certainly hoping it doesn't happen in 2015 — a year that they believe is the best chance to get to the postseason in quite some time. Williams will be paired with Marcell Dareus to form one of the best defensive tackle duos in all the NFL. They work very well with one another, and will certainly set the tone for the defense as they have done for the past several years.'