Atwell (coach's decision) is inactive for Monday's game at San Francisco, Gilbert Manzano of The Orange County Register reports.
Atwell was available for the Rams' first three contests of the season, failing to haul in either of his targets on 12 offensive snaps. Now that he's donning street clothes Week 4, the team will turn to Brandon Powell and Lance McCutcheon as the reserve wide receivers behind the top trio of Cooper Kupp, Allen Robinson and Ben Skowronek.