Vikings DE Brian Robison (shoulder) returned to practice Friday and is listed as questionable for Week 16. "We'll talk a little bit more about how we want to proceed with him. But he did enough in practice (Friday) to create some encouragement amongst our staff and his teammates as well," said coach Leslie Frazier. Robison suffered a Grade 3 sprain of his right shoulder in last weekend's win at St. Louis. He left the locker room in a sling and didn't practice on Wednesday or Thursday. If Robison sits, Everson Griffin will start at left end.