In 2025, the United States will introduce new regulations for baseball bats used in all levels of play, from Little League to the Major Leagues. These new regulations are designed to increase player safety and reduce the risk of serious injuries.
The most significant change under the new regulations is a reduction in the allowable barrel diameter of baseball bats. The current maximum barrel diameter is 2 5/8 inches, but it will be reduced to 2 3/4 inches in 2025. This change will make it more difficult for hitters to generate power, as the smaller barrel will create less surface area for the ball to hit.