you clearly have no idea how the brain works. yes you can physically deteriorate, but dude is 19 so thats isnt even in play. dude shoulder has been fine for months now, and there was never any structural or muscular damage as it wouldve been disclosed by the team. he was diagnosed with "muscular imbalance", which is something a majority of americans suffer and live with. so basically he was never "hurt" to begin with...dude simply dealing with a mental block. im sure doctots, his coach, and science no more about it than you...just admit you were wrong. no amount of gymnastics is gonna change science man. if you attempt to change your shot, and forget the old one..that is a
MENTAL ISSUE. he seems to have lost his rhythm and cant get it back. its all
mental. Im done with this topic. you should probably read this to better understand.
How Does Practice Hardwire Long-Term Muscle Memory?
Every athlete, musician, surgeon—or anyone who regularly performs a motor skill that becomes fine-tuned with practice—knows that through repetition and practice motor skills become automatic. Everyday activities like typing on a keyboard, driving a car, or tying your shoelaces become automatic over time for anyone without a neurological disorder.
What is happening in the brain that hardwires and consolidates the formation of motor skills into long-term memory?
The Cerebellum Is the Seat of Muscle Memory
When I was growing up, my father, Richard Bergland, M.D., was my tennis coach. My dad was a neurosurgeon and nationally ranked tennis player who believed that his “eye for the ball” was directly linked to his proficiency in the operating room. He would say, "Of this I am absolutely positive, becoming a neurosurgeon was a direct consequence of my eye for the ball."
The ability to lock your eyes onto a target while tying a surgical knot or hitting a tennis ball in the sweet spot of your racquet is called the vestibulo-ocular reflex (VOR) and is a function of the cerebellum. New research has identified a connection between Purkinje cells in the cerebellum and vestibular nuclear neurons working together to form long-term motor memory.
As a coach in the 1970s, my dad would say to me, “Chris, think about hammering and forging the muscle memory held in the Purkinje cells of your cerebellum with every stroke.”
The traditional view of long-term motor memory that my father was referring to was based on the “Marr-Albus model” which proposed that muscle memory was the result of
long-term depression (LTD) of the parallel fiber synapses onto Purkinje cells in the cerebellum. The result of 'long-term
depression' reduces activity following a stimulus which allows for fluidity of movement and precision of fine-tuned motor skills.
The March 2015 findings resulted from a
collaboration of researchers at the University of Electro-Communications and the RIKEN Brain Science Institute in Japan, and the University of California, San Diego.
The researchers were able to integrate the multiple plasticity mechanisms of the cerebellum to explain the formation of long-term motor memory. Their findings suggest that multiple plasticity mechanisms in the cerebellar cortex and cerebellar/vestibular nuclei participate in long-term motor memory formation.

please educate yourself