Literally exactly what the link is that I posted above.

If you won't read scientific research, notes:

The eight baseballs we tested were split into two groups: an “old group” of four balls used in games played between August 2014 and May 2015, and a “new group” of three balls used in games played between August 2016 and July 2017, plus the brand-new ball. The aim was to see if the internal composition of the baseballs had changed in ways that would affect the ball’s performance.

....

Dr. Law’s team isolated the density difference to the outer (pink) layer of the core, which was, on average, about 40 percent less dense in the new group of balls. .... While other parts of the ball showed slight differences in density and volume, none were as noteworthy as the changes to the core.It’s not just that the inside of the ball looks different — the chemical composition of the cores appears to have changed as well.

...

According to a previous analysis performed by The Ringer, that increase in bounciness alone would add around 0.6 mph to the speed of the ball as it leaves the bat and add roughly 3 feet to the travel distance of a fly ball — enough to make the difference between the warning track and the stands.

...

On top of the fact that the balls became bouncier as the core itself changed, previous research at FiveThirtyEight showed that they also became less air resistant. The decrease in drag is probably a result of a smaller, slicker baseball with lower seams. The change in air resistance could add an additional 5 feet to the travel distance of a fly ball. Combine all these factors together — a lighter, more compact baseball with tighter seams and more bounce — and the ball could fly as much as 8.6 feet farther. According to Nathan’s calculations, this would lead to a more than 25 percent increase in the number of home runs. Asked whether these changes in combination could have significantly affected the home run rate, MLB declined to comment.

...


In actuality, home runs spiked by about 46 percent between 2014 and 2017, which means that the changes to the ball could account for more than half of the increase. The remainder could be reasonably chalked up to a philosophical shift among MLB hitters, who are likely swinging upward to maximize the number of balls they hit in the air and are not shy about the increase in strikeouts that may come with that approach.

This post was edited by JadeBlade23 on Jul 10 2019 10:19pm

Where does one acquire this ball juice?

yes huno p

Isnt this topic posted every year

Every year since Manfred took over in 2015, because it is true.

Stitching is tighter in the seams. They've already admitted there's less drag. What is drag? Simply put its air resistance on the ball. I believe that the gap between the stitching and leather is much less this year that in years past.

Question is, was it intentional or did they renovate the machines that produce the balls and this was a side effect.