It is unclear exactly when Havenstein's injury occurred during last Sunday's loss to the Steelers or when he exited the contest for good. McVay said Havenstein will miss at least this week, but it could also be up to two weeks before he returns.
Rookie David Edwards, who started last week's game in Pittsburgh at right guard, slid over to right tackle as Havenstein's replacement. When asked whether he would be more inclined to continuing playing Edwards there, McVay said the coaching staff's "initial reaction" would be to keep Edwards at guard – Edwards also started at left guard in the Rams' prior two games – but it's not a final decision.
It's another hit to a Rams offensive line that lost starting center Brian Allen to a season-ending MCL injury from Sunday's game and starting LG Joe Noteboom to an ACL and MCL injury earlier this year.
The injuries leave Edwards, LT Andrew Whitworth, Austin Blythe, Austin Corbett, center Coleman Shelton, OL Jamil Demby and tackle Bobby Evans as the only healthy offensive linemen on the Rams' 53-man roster. They also have guard Chandler Brewer and OL Jeremiah Kolone on their practice squad.
Blythe started at left guard before replacing Allen at center on Sunday, Corbett stepped in for Blythe at left guard and Shelton stepped in for Edwards at right guard. Demby saw action as Noteboom's initial replacement but hasn't been active since Week 6.
Los Angeles will be monitoring the waiver wire as another possible avenue of adding offensive line help.
"We'll work through some potential options, and ultimately it's about putting together the best five," McVay said. "But in a lot of instances, you'd prefer to not necessarily feel like you're falling off at two spots, but just one, if all things are equal. We'll navigate through that over the next 24 hours."
Regarding the length of Williams' absence, "it will probably be a couple weeks for him as well," McVay said.
Cooks, meanwhile, still has not cleared concussion protocol since being placed in it following the Rams' Week 8 game against the Bengals. However, McVay said the receiver is feeling good and asymptomatic at this time.
"Everything is really in good shape with (Cooks) right now, but he will miss this week and then we'll re-evaluate the following week."