Pitch behind the back

[JEL]

After this thread was started, I had a HS pitcher do something I had never seen before.

Pitcher would deliver the ball UNDER her NP leg! The first time she did it I had to think "did I see what I think I saw"?, and "is it legal"? I was FU, and the plate guy with 35+ yrs of experience seemed to be caught off guard. On the 2nd pitch under the leg, he called it illegal due to the leg landing outside the 24" lane. I don't think she landed outside the lane, and I have been unable to find any ruling to make it illegal.

Pitches weren't accurate, but they sure looked funky to the batter.