The Kansas City Chiefs will face the Oakland Raiders on Sunday without the services of their best pass rusher after linebacker Justin Houston was officially ruled out of the contest.

There was optimism earlier in the week from the Chiefs that Houston could play after he was ruled day to day due to a hyperextended knee, an injury that was not as serious as first feared.

However, it appears Houston's recovery during the week didn't go as well as expected, so Dee Ford is likely to start in his place.

The Chiefs will also be without safety Husain Abdullah due to a concussion.

Abdullah experienced concussion symptoms in Friday's practice, with the Chiefs examining him and ultimately deciding to rule him out of Sunday's game.