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Clay upgrades Bills' passing game

New Bills tight end Charles Clay had a lot of success after the catch in 2014. Rob Foldy/Getty Images

Pro Football Focus will be providing analysis for every major NFL signing and trade during the 2015 free-agency period, accounting primarily for the quality of the player and his fit with his new team, while focusing less on the financial terms of the deal.

Here is a grade for the Buffalo Bills' signing of Charles Clay.

Grade articles on every major deal