The hole where the dead cartilage was removed has filled in with fibrocartilage (not as good as the original hyaline cartilage, but supposed to be functional). The doctor says that everything is going as good as it can 3 months post-surgery. He can shoot basketball now and do wall pushups. The doctor expects that he will be swinging a bat in October. He will be playing basketball this winter. I guess that he will get into some light throwing by December. At this point in time, he appears to be a normal 16 year old kid with no ill effects. We remain hopeful that he will return to being a strong RHP.
BBallMom, I hope your son's lesion is small and centrally located (meaning it has healthy cartilage surrounding it). I think you are wise to get the surgery done; my reading of the medical literature on the subject said that rest doesn't do much for OCD. Get used to saying "No, it wasn't Tommy John surgery."