James Cook is seeking a new contract with the Buffalo Bills. He sat out practice Sunday as he negotiates with the franchise.

The Buffalo Bills aren’t commenting on the reason behind James Cook not participating in practice in what could be viewed as the running back’s next step in escalating his bid to extend the final year of his contract.

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,