I've said this before, and thinking about it again I believe strength and conditioning is one of the main factors of this team not playing well in the second half. You can see the fatigue set in with this team in the second half, hence why there is so many mental errors. I know this is not the only factor, but I believe it is one of the main factors for poor play as the game goes on.
Auburn may want to reevaluate the strength and conditioning program. I see the same issues with the football team as well.