Bills fans are used to seeing defensive end A.J. Epenesa make a few incredible plays per season, and his athleticism was on full display Sunday, sacking quarterback Josh Allen, returning an Allen interception for a touchdown, and tipping a pass at the line of scrimmage.

It’s unknown what exactly changed since Cook part participated in the team’s Return of the Blue & Red scrimmage on Friday night, but a lack of progress in contract talks could be why the back is suddenly having a hold-in of sorts at Bills training camp.

James Cook had one word on his mind Sunday — and he said it more than half a dozen times: business. The Buffalo Bills running back showed up at St. John Fisher University in full team gear but didn’t take a single rep during practice. It marked his ...