In 2025, the USA applied new laws for the usage of baseball bats in skilled and collegiate baseball leagues. These new laws, referred to as the “2025 USA Bat Customary,” had been designed to enhance participant security and cut back the variety of accidents attributable to batted balls.
The 2025 USA Bat Customary established new efficiency requirements for baseball bats, together with limits on the coefficient of restitution (COR) and the second of inertia (MOI). COR measures the trampoline impact of a bat, whereas MOI measures the resistance of a bat to twisting. The brand new laws additionally require that every one bats be licensed by the Baseball Bat Producers Affiliation (BBMA) to fulfill the brand new requirements.