[qwerty49]

Great points Hulk. This would indeed be a good interview topic for Richard Sherman, ie how would he defend that play.

JJ runs the AW Box Out.  From the first time a former basketball player sees him do it, he realizes that JJ moves  comes from the defender's box out for a rebound n basketball.  The technique:

1.  Set and plant your feet firmly and a little wider than shoulder length, to maximize your resistance to pusn/pressure from behind. 
2.  Stick out your ass into the opponent's hips, to maximize the distance between you and the opponent.
3.  Raise your elbows to make two wings, and stiffen them against pressure from the opponent and to prevent him from moving around you.
4.  Nudge the defender back with your butt

How do you counter it as a defender? 

1. Be a lot taller--and more important, longer; have a much bigger wing span than the defender.
2  Sneak a hand onto the boxing out guy's jersey and try to restrain his jump.   Hope the ref misses it.
3. Try to box out the receiver on one side, conceding him most of the space but gambling that the ball will come to the side you've boxed out.  (This is a move that isn't easy to describe.  At least for me at this early hour.

JJ simply is so long, so strong, and so well-trained in boxing-out from his hoops days, that you have to do your best, gamble to one quadrant, and hope Costello misses the throw and puts it into the quadrant you've managed to claim. 
'
I don't see another defense to it. It has worked in basketball since the inception of the game, and defenders consistently get more rebounds than offensive players--and that's for balls that aren't predictable.   A football throw is. 

And yes, it's not a fade.  I suspect there must be a pro somewhere who uses the move--most receivers played basketball--but I don't watch pro football.  And a guess is that pro teams are more apt to have taller corners who can match up better with the play.  It'd not a good play to tgry to run against Richard Sherman, as one example.

[qwerty49]

Great points Hulk. This would indeed be a good interview topic for Richard Sherman, ie how would he defend that play.

JJ runs the AW Box Out.  From the first time a former basketball player sees him do it, he realizes that JJ moves  comes from the defender's box out for a rebound n basketball.  The technique:

1.  Set and plant your feet firmly and a little wider than shoulder length, to maximize your resistance to pusn/pressure from behind. 
2.  Stick out your ass into the opponent's hips, to maximize the distance between you and the opponent.
3.  Raise your elbows to make two wings, and stiffen them against pressure from the opponent and to prevent him from moving around you.
4.  Nudge the defender back with your butt

How do you counter it as a defender? 

1. Be a lot taller--and more important, longer; have a much bigger wing span than the defender.
2  Sneak a hand onto the boxing out guy's jersey and try to restrain his jump.   Hope the ref misses it.
3. Try to box out the receiver on one side, conceding him most of the space but gambling that the ball will come to the side you've boxed out.  (This is a move that isn't easy to describe.  At least for me at this early hour.

JJ simply is so long, so strong, and so well-trained in boxing-out from his hoops days, that you have to do your best, gamble to one quadrant, and hope Costello misses the throw and puts it into the quadrant you've managed to claim. 
'
I don't see another defense to it. It has worked in basketball since the inception of the game, and defenders consistently get more rebounds than offensive players--and that's for balls that aren't predictable.   A football throw is. 

And yes, it's not a fade.  I suspect there must be a pro somewhere who uses the move--most receivers played basketball--but I don't watch pro football.  And a guess is that pro teams are more apt to have taller corners who can match up better with the play.  It'd not a good play to tgry to run against Richard Sherman, as one example.