The Minnesota Vikings have added guard Dalton Risner to their offensive line, signing him to a deal worth about $4 million for the remainder of the season. The Vikings have struggled to open holes in their running game, and Risner is expected to provide an improvement. Risner has been on the Vikings' radar for a while and visited the team during training camp. The interior of the Vikings offensive line has been a trouble spot, with injuries and struggles from other players. Risner started all but four games for the Denver Broncos and has played through various injuries.