https://tht.fangraphs.com/big-league...ague-stadiums/
Pretty good little article that happens to have a specific focus on the Bats
In 2018, International League teams scored 4.16 runs per game and Pacific Coast League teams scored 4.97 runs per game. This year, it’s 5.20 and 5.65, respectively. Yeah, the ball is carrying farther. The Bats have had a couple of players with breakout power years as at least a partial result of the new ball. Josh VanMeter, in 131 plate appearances, was one homer short of his career best in this, his seventh season as a pro, when he was called up by the Reds. Notably, he’s made changes to his approach that can be seen in his second-half numbers from last year, but he never had shown power on this level.
Brian O’Grady has had similar results. His 14 homers in 189 PAs match his career high. He also hit 14 last year — in 386 PAs. As with VanMeter, there were other adjustments, but that didn’t account for all of it. “There’s definitely times you can notice,” O’Grady told me. “I hit a double the last night that went farther than I thought it was gonna.” When I talked to him, he clearly liked the new ball. “I think the ball plays more true. I think before there were a lot of times when guys hit balls and they went like nowhere. Now, if you hit it, you get rewarded for it.”