In 2025, the US carried out new rules for the usage of baseball bats in skilled and collegiate baseball leagues. These new rules, referred to as the “2025 USA Bat Commonplace,” had been designed to enhance participant security and scale back the variety of accidents brought on by batted balls.
The 2025 USA Bat Commonplace 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 rules additionally require that every one bats be licensed by the Baseball Bat Producers Affiliation (BBMA) to satisfy the brand new requirements.