The Vikings placed offensive tackle Riley Reiff on the COVID-19 reserve list, the team announced Wednesday.
It is unknown whether Reiff tested positive or was in close contact with someone who did.
It leaves a question about a bonus of $1 million he can earn based on playing time, Chris Tomasson of the Pioneer Press reports.
Reiff has played all 1,002 snaps, assuring him of a $1 million bonus for playing 86 percent of the snaps this season. He would earn another $1 million if he plays 93.75 percent of the snaps.
He has missed eight games in nine seasons.