The Vikings envisioned 2018 a year when it’d need to devote top dollar at quarterback, first thinking it could be Teddy Bridgewater and then Sam Bradford. So Minnesota was uncharacteristically among the NFL’s top spenders during the biggest wave of free agency last week. After a flurry of moves, including the additions of quarterback Kirk Cousins and defensive tackle Sheldon Richardson, the Vikings sit with around $20 million in cap space, according to NFLPA records.