Send him for TJ tomorrow so he can start getting healthy!
I'm sure if they felt it was needed, they'd do it. You don't just send a kid for "preventative surgery". He's 17, if rehab will fix it, great. If not, then sure get the surgery done. It seems as though that due to the success rate of TJ surgery, as soon as there's any type of elbow injury, send him under the knife. If they trusted these docs with JZ and Strasburg, I'm pretty confident they'll make the right decision.