I read that landing too closed or open can effect a pitcher’s arm health. Though I can’t help but notice in this vid that Maddux lands very closed and you can even tell by his dragline. It goes waayy off to the right, but this guy is said from everybody that he has very good mechanics. I’m not saying he doesn’t cause of his health during his entire career, he must of been doing something right, or just plain lucky. He also doesn’t seem like a max out or even 95% effort guy which could of saved his arm a lot less stress. He’s shown that he could hit low 90’s but I believe it was a choice not to throw in the 90’s vs not being able to hit 90 because of genetics/ability.
Anyway, here is the video I was watching: