Thomas (undisclosed) was placed on the reserve/COVID-19 list Friday, Marisa Contipelli of the Bengals' official site reports.
It's unclear whether Thomas tested positive for the virus of if he's considered a close contact, but he'll now be unavailable until he clears the health and safety protocols. He has only five catches for 52 yards in 10 games this season, so his absence shouldn't affect Cincinnati's offensive game plan.