Minnesota Vikings running back Alexander Mattison (concussion) remains in the league's concussion protocol on Monday, per The Athletic's Alec Lewis. A concussion forced Mattison from the third quarter of Sunday's eventual 27-19 home win over the New Orleans Saints, leaving explosive change-of-pace back Ty Chandler with a featured role in his stead. It's been a tough year for the 25-year-old Mattison, who is plodding for 3.5 yards per carry and zero rushing touchdowns over 130 attempts in his ...