My son's injured……….

Hi all…My son plays pro baseball in the minor leagues and has been plagued with injuries. Started out in 1996 had to have Tommy John surgery…rehabbed 28 long months. Then scoped his shoulder, then frayed (not torn) labrum that was cauterized, then Lyme’s disease (which they think is why he has had all those tears/probs). Last year was a great year…fast forward to this May…now has extreme pain in right shoulder…used to throw in mid-90s, now can only muster up to mid-80s…in all other injuries, they hurt all the time, even when resting. THIS one hurts only when he starts the pitch, when his arm is coming forward. Feels ‘loose’ he says….really painful. So, could that labrum be acting up again? OR??? He is scheduled for an MRI next week……..sigh………..sooooooooooooooooooooooo damn frustrating. The kid is just amazing…never quits. It’s ME whose freaking out…
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Thanks loads!