My DD had impressive speed at 8 years 40+ and at 9 she was throwing 44+. We took her to a reputable PC year ago to correct her mechanics year ago. She is coached to throw hello elbow style. Now she is stuck at 42 and worst she throws 40 in the game. She is tall and has good physic. her PC thinks her mechanics are good and she is not putting effort. I know for the fact kid is hard worker and puts lot of time( at least 4 days a week) and effort into practice. I am started wondering if she is not gaining speed to due to wrong pitching style or she just is not pitcher. She has good command and good mound presence.