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CHARLOTTE, NC - AUGUST 08: C.J. Spiller #28 of the Buffalo Bills during their game against the Carolina Panthers at Bank of America Stadium on August 8, 2014 in Charlotte, North Carolina. Buffalo won 20-18. (Photo by Grant Halverson/Getty Images)

CHARLOTTE, NC - AUGUST 08:  C.J. Spiller #28 of the Buffalo Bills during their game against the Carolina Panthers at Bank of America Stadium on August 8, 2014 in Charlotte, North Carolina. Buffalo won 20-18.  (Photo by Grant Halverson/Getty Images)