They were talking about this on the post-game the day it happened. Posednik was saying how when Thome was DH he was never sitting in the dugout. Always walking around. Always stretching. You have to stay loose. Especially as a DH.
I think Eloy is a moron, doesn't realize any of this, and his injuries, at this point, are entirely on him. I never see him stretching, and with his injury history, he should have a daily hot yoga session setup. It's absurd for a professional "athlete" to have this many soft tissue injuries.
Flexibility is absolutely something you can work on, if you want to.