Would a 37 yo like him even go through Tommy John at this stage of life? This seems like it could be the end of him as an ace.
Astro's rotation is a shell of itself now, and now has 36 yo Grienke as the ace. They're not anything special anymore as a team.
Probably, but it would be for quality of life.
Them again, I could see him doing it and rehabbing just to prove the haters. He doesnt need to throw 95+ to be effective. His slider, curve, and change would be good enough to keep him as an effective pitcher for a while.