Mattison (concussion) missed practice Wednesday.
After sitting out two games due to an appendectomy, Mattison logged six snaps on offense and eight more on special teams in the Week 15 loss to the Bears, finishing with two touches for 15 yards from scrimmage. In the course of that contest, Mattison suffered a concussion, so he's now subject to the NFL's protocol for head injuries before he can suit up again. Because the Vikings are operating on a short week with a Friday matchup with the Saints on tap, Mattison seems unlikely to play Week 16, especially with no practice reps yet under his belt.