You mentioned Lee Trevino having tape over his left thumb. I also read your post on this subject "somewhere." The question is this: Was the purpose of this tape because his thumb was irritated or simply so he would have better feel with the #1 Pressure Point, whether he called it that or not.
Dave
Is Lee Trevino taping his thumb because it is irritated?
Well, if so, all I can say is that it has been irritated for about 36 years, because that's how long I've watched him play Golf! And ever since I can remember, that Gloved Left Thumb has always been taped. Personally, I think he originally did it to prevent any possible slippage between the Glove and the Shaft, and it has long since become a habit.