Do you use a 'long' thumb or a 'short' thumb in your left hand grip?
Defnitely a long thumb but I may have overdone it as I often hit hundreds of balls daily over the last 10 years.
In addition to being Cocked (a Vertical Motion) at the Top, is your Left Wrist also Arched (a Horizontal Motion)? Combined with the Long Thumb, that could put a great deal of stress on the Left Wrist during the Lag Loading at Start Down.
Hybrid Mode
