Stafford was placed on the reserve/COVID-19 list Wednesday because he is considered a "high-risk, close contact," Adam Schefter of ESPN reports. He could be eligible to play Sunday against the Vikings if he remains asymptomatic and tests negative for the coronavirus for five consecutive days.
According to Dave Birkett of the Detroit Free Press, Stafford's last contact with an infected individual came Monday, so he could have just enough time to gain clearance for the Week 9 matchup in a best-case scenario. That said, Stafford won't be able to practice at any point this week, so the Lions will dole out the quarterback reps to both Chase Daniel and David Blough this week. Daniel would be the likely favorite to start in Minnesota if Stafford doesn't gain clearance to play.