With his contract dispute ongoing, Buffalo Bills running back James Cook showed up for Sunday's mandatory practice but did not participate. Instead, the 25-year-old stood off to the side and spent a short amount of time on an exercise bike.

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

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,