In 2025, the USA carried out new rules for the usage of baseball bats in skilled and collegiate baseball leagues. These new rules, often called the “2025 USA Bat Normal,” have been designed to enhance participant security and scale back the variety of accidents attributable to batted balls.
The 2025 USA Bat Normal 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 each one bats be licensed by the Baseball Bat Producers Affiliation (BBMA) to satisfy the brand new requirements.