Stafford was placed on the reserve/COVID-19 list Saturday, according to Ian Rapoport of NFL Network.
Stafford joins a number of other big-name Lions players that were placed on the reserve/COVID-19 list over the past week. The designation means either Stafford tested positive or was in close proximity to someone who texted positive for COVID-19, so until more information is provided, speculation regarding his return timeframe is baseless.