During the NFL draft process, teams will spend a lot of time with players to gather as much information as they can. In doing so, they will host 30 draft prospects on a top 30 visit.
Those visits will include a lot of things, including a workout, physical, interview and likely dinner as well. They are afforded 30 of those each year. Along with that, they are allowed to bring in any prospect whose campus is within 90 miles. For the Vikings, the University of Minnesota qualifies for that.
