Long Roller -- First, let's be sure we're talking about the same side of the thumb. Hold your hand out with the palm facing you and touch the tip of your middle finger. What we ball drillers refer to as the right side of your thumb will be on the left the way your hand is now facing. If knuckling is not your problem, you may need to increase lateral pitch toward the callous, which would be increased right pitch. -- JohnP