In contrast, MLB made hundreds of thousands of Statcast and HitF/X data points available to the commission for testing, as well as many official game baseballs. Despite the deep and meticulous analysis performed by the committee, the report does not offer firm conclusions about what aspects of the baseball changed to reduce air resistance. While the process of manufacturing the baseball has changed slightly in the last three years, there is no indication that Rawlings' changes caused the reduced air resistance and home run surge. The report's authors note that more uniform winding of the yarn around the center of the baseball could have changed the center of mass within the ball, potentially resulting in decreased drag. Most importantly, it shows that MLB and Rawlings take the concerns about the ball being different seriously, and are willing to take this opportunity to implement new procedures to better control the baseball. The narrative of the baseball being "Juiced" since 2015 began with the idea that MLB was tampering with the hidden center of the ball, and the amount of springiness that center provides. This report is the first time MLB has officially confirmed that the baseball may be to blame for the home run surge and the massive effects it wrought on the sport.

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How one tiny change to the baseball may have led to both the home run surge and the rise in pitcher blisters

After taking apart and examining twenty-six baseballs, a possible explanation for the rise in both home runs and pitcher blisters emerged: The laces in the newer baseballs are noticeably different.

The Home Runs Keep Increasing, But Are the Baseballs Different After All?

How has the baseball evolved over two centuries? Moderately, but notably enough to change outcomes.