Nacua, who left Tuesday's practice with a groin injury, could be sidelined for "a few days," Adam Schefter of ESPN.com reports.
Per Ian Rapoport of NFL Network, Nacua's issue was initially described as minor groin soreness, and Schefter's report supports the notion that the star wideout's injury isn't a long-term concern. With that in mind, it seems likely that the Rams will play it safe and Nacua won't suit up for Saturday's preseason opener against the Chiefs.