[Adam]

Originally Posted by Texas Aggie

A "pass" is defined as a movement of the ball -- thrown, batted, or rolled -- to another player (Aggie paraphrase; 4-31). There's no requirement that the ball be caught by the other player. If it hits him in the back while he's OOB and the ball stays OOB, then we are still OK. As long as we don't have a throw in violation (5 seconds, passing the ball onto the court, etc.) or a "caused to go OOB" violation (player touching the ball OOB while being inbounds, etc.), and the ball is thrown, batted, or rolled to another player, we are OK. Play on.

Just to add to this; if the ball hits A2 in the back (he's OOB) and bounces directly inbounds without touching the floor OOB, this bounce is now the throwin and must be touched inbounds next by anyone but A2 to avoid a throwin violation.