Stanford is a much better team now that QB K.J. Costello is back from a thumb injury. The Cardinal have a balanced attack with Costello, who has the skill set to find his second and third targets. Stanford also is in the hunt to become bowl eligible for the 11th consecutive season. The Cardinal can't afford to slip here.
I don't they will given Colorado's woes. 
The Buffaloes entered the season with a great deal of optimism under first-year coach Mel Tucker. That's gone now. The Buffaloes have underachieved offensively scoring 14 or fewer points in three of their last four games and their defense has falled apart due to attriution and injuries. Colorado ranks second-to-last in the Pac-12 in scoring defense allowing 34.4 points.