Minnesota Vikings QB Kirk Cousins tests positive for COVID-19, will miss preseason opener 1:33 PM ET Kevin SeifertESPN Staff Writer Close ESPN.com national NFL writer ESPN.com NFC North reporter, 2008-2013 Covered Vikings for Minneapolis Star Tribune, 1999-2008 EAGAN, Minn. -- Minnesota Vikings quarterback Kirk Cousins has tested positive for COVID-19, coach Kevin O'Connell said Friday. Cousins will be required to isolate for at least five days, meaning he will not travel with the team for Sunday's preseason opener against the Las Vegas Raiders . Barring complications, Cousins would be eligible to re-join the team Tuesday for the final week of training camp. O'Connell said Cousins' symptoms are minimal. The Vikings sent Cousins home from training camp Thursday after he fell ill but did not immediately confirm the diagnosis. He missed one game last season after testing positive for COVID-19. He also quarantined for five days of training camp last summer because he was an unvaccinated close contact of backup quarterback Kellen Mond , who had tested positive. The NFL paused its remaining COVID-19 protocols in March. But all league employees -- including players -- are required to follow CDC guidelines following a positive test. Teams can also impose additional protocols if they choose. O'Connell had not revealed his preseason playing time plans for Cousins, and it's possible Cousins would not have played against the Raiders regardless. Backups Mond and Sean Mannion , who have been competing to be the No. 2 quarterback in camp, will handle the load Sunday.