I believe the B has to pick this up, however I think there was some confusing information (or maybe I am wrong, it is entirely possible).
Wouldnt the B's first key be the tight end #44 at the bottom of the screen in the formation? He could have been watching that action and miss the receiver/DB crossing and therefore not see the whole play.
The top and bottom wide outs would initially be the LJ/HL, and while they arent threatened, his focus could have been on TE blocking, and not catch the DB/WR until too late, or something like that.
As i said, i could be wrong
