Minnesota Vikings head coach Leslie Frazier is looking for some new assistant coaches after firing quarterbacks coach Kevin Rogers, offensive line coach Pat Morris and assistant offensive line coach Jim Hueber.  Frazier has also promoted Fred Pagac to the defensive coordinator position.  The Vikings are reportedly interviewing former San Francisco head coach Mike Singletary to become their new linebackers coach and former Denver head coach Josh McDaniels to become their new offensive coordinator.  Current offensive coordinator is still on the staff and could remain on the staff as quarterbacks coach if McDaniels is hired.