The key here is the health of Patrick Mahomes as he meanders through the concussion protocols. Without him, the Chiefs would be in big trouble. Chad Henne is a solid backup, but little more than that. With Mahomes, the offense is entirely different. Buffalo is coming off a good defensive showing against the Ravens, but this is a bigger challenge if Mahomes is playing. The passing game is lethal. The Bills have been much better on defense since the midway point of the season. Coordinator Leslie Frazier has done a nice job. As for Buffalo's offense, Josh Allen didn't put up his usual gaudy numbers last week against the Ravens, but he made enough plays. It was a windy night. If the weather holds up here -- and Mahomes is in the game -- this could be a great shootout of two big-armed passers. Both defenses have improved since the Chiefs beat the Bills in Week 6, a game where Kansas City ran the football to win it. Clyde Edwards-Helaire ran for 161 in Kansas City's 26-17 victory. This time around, I think it's more of an air game with both quarterbacks having good games. I picked the Chiefs to get to the Super Bowl before the season and I am sticking with that. But it will be close -- even with Mahomes. SUBSCRIBE TO OUR CHANNEL: https://www.youtube.com/user/CBSSportsHQ FOLLOW US ON: Facebook - https://www.facebook.com/CBSSports/ Instagram - https://www.instagram.com/cbssports/ Twitter - https://twitter.com/CBSSports #NFL #Bills #Chiefs #KansasCity #Buffalo #JoshAllen #PatrickMahomes #Mahomes #AFC #AFCChampionship #NFLPlayoffs