This particular group of players including Diggs, Hollins and Polk is not the only one already feeling the pressure early during OTAs, though. Vrabel added that the entire wide receiver room, which stands at 12 deep with the draft and rookie free agency in the rear-view mirror, is needed to meet expectations.

Buffalo signed Kristian Wilkerson to a one-year contract Monday, adding another body to the most crowded room on their roster. The move gives the Bills 13 wide receivers after releasing undrafted rookie Hal Presley out of Baylor in a corresponding transaction. Wilkerson will wear No. 82 in Buffalo.

The Buffalo Bills have added wide receiver Kristian Wilkerson to their depth chart. The wideout signed a one-year deal with the team. In a corresponding move, wide receiver Hal Presley III.