Where does the left thumb go on the bat and club?

WHAT DOES THE TYPICAL GOLFER DO? 

ARBITRARY!  Not what feels comfortable or makes sense.   

“Your hands are the only part of your body that touches the club so your grip better be good.”

-Ed Famula, PGA Professional

THE MECHANICS: SHORTEN OR LENGTHENING THE THUMB 

TO SHORTEN THE THUMB: 

TAKE THE CLUB IN YOUR LEFT HAND, POINT THE SHAFT STRAIGHT IN THE AIR, DROP THE CLUB HEAD DOWN AND ALLOW THE THUMB TO SLIDE UP THE SHAFT. 

TO LENGTHEN THE THUMB:

PUSH THUMB OUT AND DOWN THE SHAFT

WHAT IS NATURAL: The thumbs are in opposition with the index and middle fingers to create a counterbalance. 

WHAT DO BASEBALL PLAYERS DO? 

Whether holding and balancing a bat or a ball the thumbs are tucked to the side on the side of the thumb (you would not make a thumb print). 

DO IN GOLF AS YOU DO IN BASEBALL:

Experience: Hold a golf club like a bat (you cannot possibly have shorter thumbs than when placing your hands on a bat or ball).   

Experience: Hold a ball in your left hand.  

Notice: While looking at your hand from your view, your left thumb is shorter in appearance than your index finger.  That is the way it is supposed to look when you balance a grip in your hands. 

Try holding a ball with a long thumb then try and throw it.  It is virtually impossible!

The LEFT THUMB is neither long nor short; it is simply where it is.  The idea of a long or short thumb is just another way to think and control your athleticism.