If a player uses a bat that is aluminum, titanium, or composite, what must be true for it to be deemed legal?

For a bat made of aluminum, titanium, or composite materials to be considered legal in high school baseball and softball, it must have the BBCOR (Batted Ball Coefficient of Restitution) certification mark. This mark indicates that the bat meets the performance standards set by the governing body, ensuring that it does not exceed the maximum allowable rebound when hitting a ball. The purpose of this regulation is to enhance player safety and promote fair play by limiting the performance advantages that certain bat materials might otherwise provide.

The BBCOR certification standard is particularly important because it helps create a level playing field among athletes by ensuring that all players are competing with equipment that performs similarly. Other factors, such as length and weight restrictions, may be present in the regulations, but those are not solely defining factors for legality regarding these specific materials. The requirement of the BBCOR mark specifically emphasizes the testing and safety behind the design of the bat, which is why it is essential for it to be deemed legal.