Bills running back Marshawn Lynch has filed an appeal with the NFL contesting his suspension without pay for the first three games of the season. The NFL confirmed Thursday that an appeal was filed, but did not provide details, including when the appeal might be heard. Lynch's agent, Doug Hendrickson, did not return phone and e-mail messages. Lynch was suspended last month for violating the league's personal conduct policy after he pleaded guilty in March to a misdemeanor gun charge in Los Angeles. He was sentenced to 80 hours of community service and three years' probation.