Gerard Warren has not practiced since the bye week when he suffered a thigh injury. The team leader in sacks with three, the veteran defensive tackle was hopeful of returning against the Chiefs but was declared out on Friday.
The good news for Oakland is that defensive tackle Warren Sapp is listed as probable to play against Kansas City. Sapp did not practice either Wednesday or Thursday due to a sore ankle but the team expects him to be available on Sunday.
Linebacker Sam Williams, however, isn't likely to play. Williams has a shoulder injury and was limited in practice.
Veteran Robert Thomas, who started and made a team-high eight tackles against San Diego, will likely get the start against Kansas City.