The Vikings placed Cook (illness) on the reserve/COVID-19 list due to a positive test for the virus, Ian Rapoport of NFL Network reports.
Cook thus will embark on a 10-day quarantine as an unvaccinated player and won't be available for Sunday's pivotal matchup with the Rams and potentially even a Jan. 2 divisional game at Green Bay. As long as Cook is sidelined, Alexander Mattison will be the Vikings' lead running back, which translated to 89 touches for 448 yards from scrimmage and two total TDs in three prior spot starts this season.