
We come out in "21" personnel and we're going to run a "spot" concept to the concept side. This threatens the defense both vertically and horizontally. Looking to put 3 receivers in zone "soft" spots. It's a progression read, but, the progression has to be moved through very quickly. It's usually, corner, snag, flat in the progression. the pre-snap read shows 2 deep safeties, but the corner is playing with a cushion and has his hips opened. This is showing that he's in zone on that side of the field. That means either, cover 3, 4 or 6.(4 and 6 would be essentially the same on this side of the field. What GB is going to do here, is play a defense very similar to Seattle's. They're going to play cover 3 with the single receiver side in man-coverage.
What CK needs to see here is, it doesn't matter that the defense is showing the 2 shell safety look, the outside corner is lined up in either a 1/3 or 1/4 zone look. That defeats the corner route. This should move his read to a key read on the hook/curl defender. However he plays will determine whether to go to the "snag" or "spot" route and the flat or take-off.

At the snap, GB's safeties move forward - similar to how LB's play. They're looking to aggressively play the run. They're giving zero help over-the-top to TS. This is some of what he was talking about.

This is at the start of his drop-back. You see the defense revealing itself. He should be keying in on #54, but doesn't.
#54 attacks the flat route and 33 attacks the curl zone, to give underneath help to the corner playing over-the-top. They're, essentially, doubling AB, which, after the last time AB tore em up, can't blame them. This frees up McDonald. You see Kaep has hit his plant foot and the ball should be coming out right here. He's got as nice a pocket as you could hope for as a QB.
You see how open McD is, but Kaep takes off - not sure why. This is what Steve Young talked about last year in "exhausting" a play before taking off. Yeah, he gains some yards, but, I think it causes more frustration and causes the defense to adjust how they play more if he hits this throw.

He takes off and gains 12 yards. You can call it, "6 one way, half a dozen the other" because the pass probably would've netted 12 yards or so. But, IMO, the throw is more important because you're trying to establish a rhythm as an offense early in the game.
Now I know why McDonald dropped the pass later on. He was surprised Kaep saw him and threw the pass






There's no good reason to skip a 10yd pass unless you are afraid it would get INT.