Curious how much it affects elite pitchers.. particularly in the modern era when players are very nutrition and health focused.
https://community.fangraphs.com/the-effect-of-rest-days-on-starting-pitcher-performance/ Literally typed your thread title into search. Try it next time.
This generic article may be good for you , but it has absolutely nothing to do with elite pitchers who tend to log heavy innings nor does it have to do with your personal observations. You could just type in astros baseball on google search to look at scores and not come here.
Ehh, let's not go the route of "google it" on these forums. We're not a Linux help forum. This is actually a multifaceted topic where lots of people of people can make contributions and interpretations, and some people are better or differently skilled at finding information compared to others. And thank you for finding and posting the link you found. It will a good seed for further discussion.