Williams was signed to the Bengals' active roster from the practice squad Saturday, Marisa Contipelli of the Bengals' official site reports.
Williams has been elevated from the practice squad on two occasions this season. However, he'll now join the roster on a more permanent basis, which could mean bad news for Chris Evans (ankle) from an injury perspective. When active, Williams has played primarily on special teams, but he does have six carries for 13 yards.