Getty Patriots potential signee Amari Cooper The Buffalo Bills left the door open for veteran wide receiver Amari Cooper to return to the team in free agency, and an injury to top pass-catcher Khalil Shakir could lead him to walk through it. Shakir was hurt in the team’s Blue & Red practice on August 1, being helped off the field with a high ankle sprain. Though head coach Sean McDermott said he expects Shakir to be on the field for the season opener, Bleacher Report’s Kristopher Knox suggested