My DD throws a two finger riseball for the last 2 years. As the season progresses both years she starts experiencing a pain along her forearm. The pain does not reach the point where she cannot pitch and she says she can deal with it. It also reduces with rest. My thought is she is overworking these two fingers and causing tendonitus. She has tried other grips but she gets great spin axis with this grip. Anyone with similar experience with riseball pitchers?