Johnson benched for Jackson

This is crazy. can some1 tell me why the vikings would do this?....(although i am glad because we have a better chance at beating them)

Actually I watched parts of the game and Jackson did more in one half then Johnson has all year. Like most teams they start preferring a young guy with mobility if the old pocket passer isn't doing anything anyway. I will say though that coming off the bench and starting a game on the road are totally different. You see it all to often when guys are hot off the bench then when they start they flunk out