Vikings S Robert Blanton (hamstring) has been sidelined since early in camp, and is uncertain for Friday's preseason game against the Chargers.
Vikings signed fifth-round S Robert Blanton to a four-year contract.
Coach Leslie Frazier expects the Vikings to have an "open competition" at safety.
Fifth-round pick Robert Blanton worked as a starting safety as the Vikings opened rookie minicamp on Friday.
The Vikings plan to use No. 139 overall pick Robert Blanton at safety.
Vikings selected Notre Dame CB Robert Blanton with the No. 139 overall pick in the 2012 NFL draft.