Buffalo looks to have all hands on deck ahead of its matchup with the Legion of Boom.
McCoy has been battling a hamstring injury that kept him out of last week's loss to the Patriots, but returned to practice on Thursday. Harvin just needed to get into "football shape" after not logging a snap since Week 5 of 2015.
The return of McCoy is a boon for a Bills offense that had come to rely on his production on the ground and then struggled through the air while he was injured. After running for at least 110 yards in three of four games, Shady exited Buffalo's Week 7 loss to Miami and with him went the Bills' potency on offense. His addition will give Buffalo's attack a much-needed dimension with Seattle's tough front looming.