I decided to make that the topic of my Hindsight column this week. (Don't you love the way I come back from a 1.5 year hiatus sounding like I never left?) Let's take a look:
First, notice that Elam (circled), the SS, was motioning to Stewart at the outset of the play. If you look at his shadow you see that he had his hand raised and was making a circling motion with it. I take that to be a reminder that they were going 1 high, and Asa Jackson (slot) was blitzing, and Elam was going to take Jackson's man. Now, look closely at the Cincy side. QB Dalton is pointing towards Asa's side. (enlarge this if you need to see better.) There was some tell , because as the play progresses, you'll see that they picked up the blitz flawlessly and he went to the vulnerable receiver. Could he have picked up on Elam's signal?
In light of this, I believe that both Dbacks share the blame, but that Chykie Brown was expecting help and got none. This is why I say: put the speedy rookie FS in. Terrence Brooks might have gotten there faster, and might have had more of a center fielder's instinct on the play. Either way, getting beat with 5 minutes left for the winning TD is as bad as any rookie can do. What do you think?