Jump ball held ball plus injury.

[MathReferee]

Originally Posted by Sharpshooternes

What happens if on a jump ball, A2 and B2 tie up a ball for a held ball call and A1 is injured in the scrum. Who jumps?

I assume you mean A2 was injured? And that this was during the jump ball to start the game and no alternating possession had been established yet?

Team B's coach gets to choose the shortest player on Team A to replace A2 and he will be the jumper.

In all seriousness, I am going to have A6, the substitute for A2 be the jumper along with B2. Not sure if this is addressed anywhere in the rules, so this is just what makes sense to me.