The uncertainty under center will continue for at least one more week in Indianapolis.
The Colts want Luck to be cleared by doctors for game action with enough time to practice all week before he returns. There is not enough time to do so this week.
Although Luck's lacerated kidney was healthy enough for a return to individual drills last week, he had not yet been cleared for 11-on-11 work.
Hasselbeck gutted out injuries to his rib, neck and arm during Sunday's loss to the Texans, but the team realized he would be touch-and-go from the opening whistle.