Episode 3 of ‘Hard Knocks’ gave fans a deeper, more candid look at the Buffalo Bills' training camp, and James Cook signed his big contract extension.

Episode 3 of ‘Hard Knocks’ gave fans a deeper, more candid look at the Buffalo Bills' training camp, and James Cook signed ...

Buffalo Bills running back James Cook is known not to smile. It's a running gag across Bills Mafia circles, but he had plenty ...