A note on Wimmers and Gibson:
I would imagine it's better to undergo TJ surgery early in one's professional career. That way your body is stronger and you have more time to adapt. Liriano obviously wasn't the same, but his mechanics had to be changed too. I don't think they altered Strasburg's mechanics at all (though I could be wrong) and he's definitely made a comeback. Gibson had good mechanics before surgery so nothing needs to be changed. I read Wimmers has pretty decent mechanics as well.
Anyway, after seeing Gibson's dominating last three outings (5.2 IP, 0 H, 0 R, 1 BB, 11 K, 91-94mph) combined with Strasburg's recovery - I'm pretty optimistic for Wimmers. Sure Liriano never returned to his phenomenal form in a consistent way, but his mechanics were terrible. They had to work with him to totally change his delivery. Gibson and Wimmers are both young and have good form, something I think will help them return to live up to their hype.
So having Wimmers undergo TJ surgery isn't that bad. It's better to have it happen now when he's still young and in the minors. Hopefully he and Gibson return strong like I think they will and become solid pitchers on our future team that includes Sano, Arcia, Hicks and... idk.. Buxton?
(Note: I'm not saying we don't need more young elite arms - we do.)