Maybe the offense can't hold onto the ball

I don't find that graph to be that shocking. At least from the distribution of the points standpoint. The most notable thing is that the 3rd quarter is so low.

I think there is probably always more scoring in the 2nd and 4th quarters for every team. When those quarters end you lose the ball so there is more urgency, whereas in the 1st and 3rd quarter you don't really care if your drive carries over to the next. Plus in blowout games the team always allows some points in the 4th quarter.

Obviously the Michigan game was a big problem. But that graph doesn't shine any more light on that one problem than what we already know was a big letdown.