Rams head coach Sean McVay said Wednesday that Nacua (knee) has a "unique" injury that may require him to miss more than the required four games while on injured reserve, Adam Grosbard of The Orange County Register reports.

The Rams conveniently have a Week 6 bye that affords Nacua and other teammates on IR some extra recovery time before a potential return Week 7 against the Raiders, but McVay's comments suggest that the second-year receiver is no lock to be ready for activation when first eligible. The team officially placed Nacua on IR on Wednesday due to a PCL sprain in his right knee that he suffered in Sunday's season-opening loss to Detroit, which was an aggravation of the bursa sac issue that he sustained Aug. 4. As long as Nacua is sidelined, Cooper Kupp will be the Rams' clear top wide receiver, with Demarcus Robinson and Tyler Johnson the next players up at the position.