NFL Week 15 Saturday grades: Vikings earn 'B+' for epic comeback; Bills get 'A' for huge win over Dolphins | CBS Sports Headlines NFL Week 15 Saturday grades: Vikings earn 'B+' for epic comeback; Bills get 'A' for huge win over Dolphins Here are the Week 15 grades for every … Continue reading NFL Week 15 Saturday grades: Vikings earn 'B+' for epic comeback; Bills get 'A' for huge win over Dolphins