After seeing an explanation by Brent Porciou, I finally got down the front leg extension and trunk tilt. I was hitting 75 finally, and wasn't even throwing as hard as I could. I was also hitting my spots 95% of the time. However, when I do this, I get extreme pain in my left hip (I think the flexor). After a few throws of actually doing this, my arm felt great, but my hip hurt. I waited 15 min, lightly tossed and pitched again. My hip killed and j had to quit. Why is this?
With tryouts in a couple weeks, I don't know what to do. If I don't extend my front leg, I lose Velo, my UCL hurts, and I am completely wild.