The Atlanta Falcons are shutting down their facility Thursday morning after four positive COVID-19 tests, sources told ESPN's Adam Schefter.

The Falcons placed Marlon Davidson on the Reserve/COVID-19 list Tuesday after, according to sources, the rookie defensive lineman tested positive for the virus.

Davidson, a second-round draft pick out of Auburn, played 12 defensive snaps and five snaps on special teams in his team's 23-16 loss to the Carolina Panthers on Sunday.

Davidson becomes the second Falcons player to test positive for COVID-19 since the beginning of the regular season. First-round draft pick A.J. Terrell, a cornerback out of Clemson, tested positive the Saturday before the Falcons' Sept. 27 home game against the Chicago Bears. Terrell missed two games before being activated Oct. 8. He was the first NFL player to miss a game because of COVID-19.

The Falcons announced Wednesday evening that they also entered the NFL's intensive protocol.

The 0-5 Falcons and interim head coach Raheem Morris are scheduled to take on the 1-4 Minnesota Vikings in Minneapolis on Sunday. Morris took over after the Falcons fired Dan Quinn and general manager Thomas Dimitroff following the loss to the Panthers.