Minnesota Vikings rookie running back Alexander Mattison (ankle) got in a limited practice on Saturday and is questionable for Week 16 against the Packers on Monday night. With Dalvin Cook (shoulder) being ruled out, Mattison could have RB2 upside in a good matchup against the Packers if he plays, but at less than 100 percent he'd also be in danger of losing valuable touches to Mike Boone, who scored two touchdowns in relief of Cook last weekend. Mattison is shaping up as a very risky fantasy...