Holdouts are rare these days because of how the fines for voluntarily skipping training camp can add up. As a result, hold-ins have become increasingly popular. In terms of the PR game, it applies just as much pressure on a team than if the player wasn't in camp whatsoever.

Cook has openly wanted a new contract. When asked for a reason why the running back did not participate, the team issued a "no comment."

The James Cook contract situation took an interesting turn when the Buffalo Bills starting running back didn't participate in mandatory practice. Cook was present at practice, but as he searches for a lucrative extension,