Lacy (hip), Lang (ankle) and Sitton (toe) were all listed as probable by the team on Friday.
Reserve cornerback Davon House (shoulder) is inactive, as is backup linebacker Jamari Lattimore (ankle), who was placed on injured reserve on Saturday.
For Buffalo, starting safety Da'Norris Searcy was already ruled out on Friday because of a hamstring injury. Duke Williams will start in Searcy's place.
AP NFL website: www.pro32.ap.org and http://twitter.com/AP-NFL
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