Cardinals quarterback Carson Palmer said Williams and David Johnson will need to step up, after Chris Johnson (knee) and Andre Ellington (ankle) suffered injuries during Sunday's win over the 49ers, according to Kent Somers of the Arizona Republic.
Interestingly enough, there was no mention of Stepfan Taylor, who had one carry for two yards in Sunday's game. Williams is currently signed to the Arizona practice squad, but he may join the roster within the next few days. If Chris Johnson and Andre Ellington both miss time, Carson Palmer seemed to suggest that Williams may actually be ahead of Taylor, albeit for the backup role behind David Johnson.