Minnesota Vikings running back Alexander Mattison (ankle) was not seen at the portion of Wednesday's walkthrough practice that was open to the media. Head coach Kevin O'Connell didn't rule out Mattison for Sunday's Week 16 contest against the Detroit Lions, but he also spoke more strongly on Wednesday than he did on Monday about the likelihood of Ty Chandler serving as the team's primary RB for the second straight game. Mattison sprained his right ankle in Week 14 and sat out last Saturday's ...