bench player grabs a live ball...

[JM_00]

hypothetical... What do you got?

A1 is passing the ball to A2 along the sideline. Player B6 who is on the bench reaches up and grabs the ball. What do you call? citations please.


another similar sit.: This is how it happened last night.
A1 is attempting to inbound the ball at the division line. Ball is deflect slightly by B1 and is bouncing towards A2 in the BC. Bench Player B6 grabs the pass. I don't think it was intentional or unsporting in any way, just a reflex - he thought it was going OB. Officials give Team A a "redo". Now, n the spirit of fair play I had absolutely no problem with them doing this. It didn't affect the outcome or any subsequent play, but I'm curious about the correct ruling by the book. I haven't looked very hard, but I would like some input from the experts here.

Thanks in advance.