I have a 11 pitcher who was throwing a 12-6 (close) fastball. It would occasionally be off a little or wobble, but nothing to drastic. All of a sudden she is throwing a bullet spin fastball, offset about 20 degrees, but it has no movement. Her form has stayed the same and speed has been consistent. I have her do snaps with taped balls and hocket pucks and she can do those fine, even at half distance. But once she backs up and is throwing full speed she seems to be doing this spin. Any idea on why this happened and if it should be changed? She has been pitching about 9 months, does not know any other pitches besides a fastball yet.