The Lions placed quarterback Matthew Stafford on the team's reserve/COVID-19 list, ESPN's Adam Schefter reports.
Schefter also reported Wednesday that Stafford had "high-risk, close contact from a non team member" on Monday.
According to Schefter, Stafford could come off the team's list and play in the Lions' game Sunday against the Vikings pending his test results.
Tom Pelissero of NFL Media reported Wednesday that Stafford will be eligible to play Sunday against Minnesota if he tests negative and asymptomatic.
The Lions will have to fly Stafford on a private plane to Minnesota because he will still under his five-day isolation window when the team departs Saturday, Pelissero reported.