need advice

I have taken the glucosamine-chondrotin twice in my career. Didn't see a huge difference but I think with that kind of stuff it is in the long run that counts. I took it twice so I must have liked it. The first time I took some brand name one and the next time I just took the generic glucosime-condrotin. I think they both worked the same. No need to spend the extra money on the nice bottle! Tell your son good luck with the catching!

Talk to your son's doctor yet?

At 14 yrs of age the body is not yet developed---why look for problems with supplements ?

Take a good multi-vitamin because everyone should not because of the sport/position.

The thing to control is how much the kid is squating.

And, If I (also a catchers parent)were going to worry about a particular supplemant it would be calcium (for growing bones and bone health).

Drink your milk!

I'd also keep an eye on how many innings he catches a year, someone here may be able to advise you to how many are to many, but you certainly don't want him catching year round. I know some kids here in AZ that just plain caught to many innings and by the time they were in HS their arms and knees had problems.

Strike 3 is correct, that's a decision best made by a doctor, maybe a sports medicine/orthopedic specialist if you have access to one.