Elbow problems with pitchers-hang in there..if you and they love the sport, chances are they've been overthrown for years. As kids get older those joints etc aren't rubber anymore and problems arise whether it be from overuse, mechanical flaws etc. They stive to win the game no matter what it takes...........
Having one child now (18) that had Tommy John at 17 and hoping and praying the next one won't. It all started with a sprained elbow medial epocodolytis(sp)xrays, MRI's,nerve tests scoped, rest, ice, PT (hours and hours). What we didn't do in the beginning was stop throwing completely and letting it heal. Ligament was replaced but since no damage to the nerve it wasn't moved. This fall with college ball the nerve got involved and slipped.no nerve damage thankfully...finally after 6 weeks resting and again rehab...(for life after TJ) hopefully a lesson learned.
My advice ..rest...go see an ortho dr. who will hopefully refer you onto a sports PT and begin with exercised to strength those muscles. Purchase an exercise ball for your son...
One good thing--older sibling in now in athletic training and plans to go on into physical therapy.