A rash of injuries at the safety position has led the Vikings to make several roster moves.
On Tuesday the Vikings announced that they have placed Antone Exum on injured reserve and waived DE Justin Trattou, clearing two roster spots.
Those two roster spots were filled by elevating safety Anthony Harris from the practice squad and signing safety Shaun Prater.
Exum was himself promoted from backup to starter two weeks ago when Harrison Smith was ruled out with a knee injury.
Exum again started against the Seahawks and played the entire game despite suffering a broken rib early in the first quarter.