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Harvin has Pro Bowl upside

When he's actually on the field, Percy Harvin is one of the NFL's unique players. Adam Bettcher/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 following their signing of Percy Harvin.

Grade articles on every major deal