Honestly I am mystified by how she gets it done, she's not a pure HE pitcher. The other two pitchers that I saw in the game were in the 58-61 mph range and they put a lot of visible effort into every pitch, not Becca. And I am not showing her video to any of my students or their parents, she's an outlier, and not an example or model. I've seen way too many kids wasting their time with straight arm-HE mechanics.