To help pitches move more and break faster, pitchers need to use their thumbs better. Instead of letting the thumb roll down during the release, the pitcher must keep pressure on her grip and keep the thumb straight as long as possible through the release. As soon as the thumb rolls down the fingers can no longer hold the ball and it will slide through the fingers.
Teaching how to use the fingers, sooooooooo valuable.
Thanks for reminding us and God bless, Don DiCarlo