Williams suffered a hamstring strain in practice Thursday and will be monitored daily, Gary Klein of the Los Angeles Times reports.
Williams hurt his hamstring on the final play of practice Thursday, and further testing has revealed a strain. Rams head coach Sean McVay said Saturday that the team is "definitely not going to rush him back," though he didn't offer a timeline for Williams' return. If the cornerback is unable to be ready for Week 1 of the regular season, Jerry Jacobs (hamstring) -- whom Los Angeles signed Saturday -- could be called upon to start.