MINNEAPOLIS (AP) -The Minnesota Vikings added depth to their defensive backfield by signing safety Michael Boulware.

Boulware spent last year in Houston. The Texans acquired him in a trade with Seattle with the intent of making him the starter, but he was beat out in camp and played mostly on special teams.

The Vikings needed another safety after parting ways with Dwight Smith and letting Tank Williams and Mike Doss leave in free agency.