whats the call if any?

[PAULK1]

I had this situation last week player A1 threw a long pass
A2 and B2 both running full speed hit each other head first
both went down one had a cut above the eye the other had
a busted lip blood every where. It took us about 10 min to clean every thing up. Since both were going for the ball
and and both were knocked out of the play and niether had actually gotten to the ball first I had a no call.