I don't want to be a downer, I think you should call around. You can likely find somewhere to get him in sooner. My son tore his UCL the end of last season. He said it wasn't at all what he thought it would feel like. Didn't have a pop. Said he doesn't know exactly, but after the pitch that did it, he said he shook off the next pitch because he knew it was going to hurt. He went on to throw to 4 more batters (not that well) but still 92-93 mph. Even the trainer did not think he tore it based on the fact that he was still able to throw and what he was able to do in the exam he did. He continued to lift and even deadlifted 600lbs and said it didn't hurt. When he got in the for the MRI it was torn. We had all pretty much decided he just had a sprain based on what he was still able to do. That said, I don't know that he did any additional damage, but who knows. I made calls and sent emails and we were even able to get into surgery with top guys within a week and a half.