The Minnesota Vikings have listed running back Alexander Mattison (concussion) as questionable for the Week 11 primetime showdown on Sunday night in Denver against the Broncos. Mattison suffered a concussion in the Week 10 win over the New Orleans Saints and never returned, leaving him up in the air to play this weekend. After not practicing on Wednesday, Mattison was limited on Thursday, but he still needs to receive final clearance through the league's concussion protocol. And with the game ...