Minnesota Vikings coach Kevin O'Connell announced on Friday that starting quarterback Kirk Cousins has tested positive for COVID-19 and will not travel with the team for Sunday's preseason opener at the Las Vegas Raiders.
Cousins will be required to isolate for at least five days before being allowed to rejoin the team at training camp, provided he tests negative.
The 2021 Pro Bowl selection missed Thursday's practice and was sent home from camp with what the Vikings initially termed an illness.
"No matter who starts, they'll both play a ton," O'Connell remarked.
Cousins was in the NFL's protocols for unvaccinated players last season and missed the Vikings' Week 17 game at Green Bay on January 2 following a positive diagnosis. Mannion started in his place and threw for 189 yards and a touchdown in a 37-10 Minnesota loss to the Packers.
The NFL has lifted coronavirus protocols for this season, though all players must adhere to the Centers for Disease Control and Prevention guidelines if they test positive.