Once a professional athlete seriously hurts themselves, regaining 100% confidence is nearly impossible. Then, should they hurt themselves again, it’s only a matter of time before the fear of injuries begins to take precedence over performing the task at hand. At that point it’s the beginning of the end. The only way Tiger could overcome this is to completely change his swing and accept his diminished power. Or, learn to play left handed. Otherwise, he will never again have the confidence required to beat the group of young fearless kids chomping at the bit to beat him.