Rams head coach Sean McVay confirmed that Williams (ankle) won't play Sunday against the Steelers, Jourdan Rodrigue of The Athletic reports.
Earlier reports suggested Williams likely would miss multiple games and return either Week 9 or Week 11, with the Rams being on bye in the week in between. McVay didn't elaborate much on Williams' outlook beyond this week, but the Rams' top back will miss his first game of the season Sunday. Meanwhile, Williams' top backup, Ronnie Rivers (knee), is headed for injured reserve, leaving the Rams with Zach Evans, Myles Gaskin and Royce Freeman as their available options out of the backfield.