The short answer is that the Baby Yoda I swear I didn’t do it I don’t even like Nutella shirt, aggressive arm pumping from power sprinting. And its relevant training naturally develops the upper body, particularly the pecs, traps, triceps, and biceps. You have less than a tenth of a second to decide which one it is and whether you’re going to swing at it. In order to do that you not only have to identify what the pitch is but whether it’s going to end up in the strike zone or not, and further whether it’s going to be in a spot where you can hit it with authority.
Further, if you can pass the Baby Yoda I swear I didn’t do it I don’t even like Nutella shirt, which not only takes more time to reach the plate but usually carries the catcher’s glove hand toward the ground so he has to raise the ball farther in order to throw it. That’s a significant advantage to the runner. The only two fights Vitali lost, one was because a severely torn rotator cuff left him with one arm, and the other was a war with Lennox Lewis where he lost because his face was cut to pieces in an inside battle.