Cook (shoulder) won't practice Wednesday and is still considered day-to-day, Kevin Seifert of ESPN.com reports.
Both Cook and head coach Kevin Stefanski referred to the running back as day-to-day before Wednesday's practice, with Cook noting the Vikings would "figure it out" come Sunday. It's not the first time he's dealt with a subluxation of his left shoulder, and while the injury cost him a game last season, the Vikings hope Cook can face the Saints in London this Sunday while wearing a harness. If not, Alexander Mattison will take over the starting job and most of the backfield work.