When you were talking about Moneyball, that "the bad-bodied hitter who walks a ton and hits" was Scott Hatteberg.
Evidence - look up speed score. You can see how much faster the league is getting before your very eyes in only a short period of time. In just 2015 there were 3 players with speed scores over 30, today there are 8. In 2015 just 37 players over 29 speed score, 2019 there were 58...and thats just in four seasons. You can go down the list. Brother, your thesis in this thread is so patently false asking someone to show evidence is kind of insulting. There is legitimately zero evidence for you to support this. Zero.
The Sport Gene is a book that outlines that while humans have not evolved, athletes have. Biologically, not really, no. However the athlete of today is much larger than that of athletes 100 years, 50 years ago, 25 years ago, etc in most sports...if there are some similar body types on average, its distributed differently - like the NBA for example. However, athletes of today have dramatically better access to specialized technology between the whistles and off the field/court...and understanding of nutrition, exercise, etc and it starts at a much younger age and is much more rigorous than it was in previous eras of sport...you like South Florida football, you clearly understand the nature v. nurture dynamic here.
Here is a quick article back to the NBA --
“You can’t teach height” - Red Auerbach We spent 2 months
runrepeat.com
A few notes --
"players are getting more agile and quicker to fit with the modern beyond-the-perimeter game."
When you compare the 7 footers of the Jordan or Bird/Magic Era whatever...
"From 2011/12 to 2017/18, NBA power forwards increased their per game 3PA by 327%."
"Over the same period, 7-footers increased the share of 3-point shots in total FGA from 4,6% up to 21.3%."