Posted by ESPN.com's Kevin Seifert
GLENDALE, Ariz. -- The roof at University of Phoenix Stadium is open on a relatively chilly and cloudy day in the desert. Hard to argue with that decision, although there could be one affect on the game.
The stadium is said to be significantly louder when the roof is closed, which also makes sense. Minimized crowd noise will only help the Vikings' offense, which will be re-adjusting to quarterback Tarvaris Jackson behind center.
We'll see if it affects the Vikings' false start totals.