Illegal Participation?

[Mike Burns]

Team A has a sub (A6) kneeling in front of the table. A1 is advancing the ball to half court when B1 knocks the ball away from A1 toward the scorers table. As the ball bounces inbounds and crosses the plane going OOB A6 grabs the ball before it touches OOB. Would it make a difference in what you call depending on; a) B1 has a play on the ball and may have saved it inbounds. b) Neither A1 or B1 has a chance of saving the ball.

Either way I am interested in knowing how you would call this.