The Buffalo Bills' preseason games are officially underway, with the AFC Champs succumbing to the New York Giants 34-25 at Highmark Stadium, with Sean McDermott's team mounting a comeback of sorts that fell short.

Although Cook is at training camp, the two-time Pro Bowler isn’t practicing as he awaits a new contract. Cook, who turns 26 on Sept. 25, is in the final season of his rookie deal and fresh off rushing for 1,009 yards and a league-leading 16 touchdowns.

Running back James Cook joined the Bills in pregame warmups but declined to play in the team's preseason opener against the Giants Saturday amid his contract dispute, coach Sean McDermott said.