The changes made to the major league baseball intended to counter a decrease in drag appear to have worked:

As part of the tweaks, Rawlings loosened the tension of the first three wool windings within the ball. The change lessened the ball’s weight by less than 0.1 of an ounce without altering its size, and decreased its coefficient of restitution (the bounciness of the ball), which in recent seasons had trended to the high end of the range MLB tries to maintain.

“Measurements from both Rawlings and the UMass Lowell test laboratory show that the desired effect was achieved,” Alan Nathan, a professor emeritus of physics at the University of Illinois at Urbana-Champaign, told Sportico in February. 

This was the lowest scoring spring training since 2015, and home runs dropped as well. As reported earlier, MLB will be cracking down on using substances to increase spin rates on the ball. So the ball won’t be traveling as far for the batters, and maybe not breaking as much for the pitchers. The hope is that this results in more line drives in the field of play. We’ll see.