Bills running back James Cook did not report for the start of Buffalo’s voluntary offseason workouts, general manager Brandon Beane said Tuesday. But the GM is not yet concerned that Cook is holding out for a new contract.

The NFL offseason can be broken down into several key phases that help teams structure their preparation for the upcoming season. From the start of free agency to preseason games, each step plays a role in getting franchises back into rhythm — and one of those phases is organized team activities,