Cook tallied eight tackles (six solo) in Sunday's 22-17 win over Atlanta.

Cook (ankle) was spotted working with the Chiefs' first-team defense Monday, Pete Sweeney of ArrowheadPride.com reports.

Coach Andy Reid said Tuesday that he does not expect Cook (ankle) to return from Kansas City's injured reserve list for the wild-card round, Nate Taylor of The Athletic reports.

The Chiefs placed Cook (ankle) on injured reserve Saturday.

Cook (ankle) has been ruled out ahead of Sunday's game against the Bills, Matt McMullen of the Chiefs' official site reports.

Cook (ankle) will not practice Wednesday,

Cook's X-ray came back negative after he suffered an ankle injury in Sunday's loss to the Packers, Jeremy Fowler of ESPN.com reports.

Cook recorded four tackles (two solo) and a fumble return for a touchdown in Sunday's 21-14 win over Miami.

Cook accumulated seven tackles (four solo) and one fumble recovery in Thursday's 21-20 loss to the Lions.