She has been pitching for 4 to 5 yrs. The last 2 years pitching for AAU teams. She just turned 16. She has never had a problem with this before. She did have a problem during the winter with pain developing in her forearm, but we corrected it with the help of this forum. I'm not seeing as changes to her delivery, but I haven't looked at it on film yet. During the season she was getting into a bad habit of not going down the power line/stepping accross it, but we've been working on that. She pitched great all summer, so it wasn't something she was dealing with until the very end.