Garrett hurt his groin in practice Tuesday and has a "days or weeks" timetable for a return, Jourdan Rodrigue of The Athletic reports.
Garrett is competing for a spot in the Rams' linebacker corps, so any missed time could definitely hurt his chances of making the squad. A rookie last season, Garrett spent most of his time on the practice squad, with a Week 3 contest against Tampa Bay his only regular season action.