This talk will focus on the equipment regulations in baseball and discuss the physics and engineering relating to the bat-ball collision. I will describe how and why the equipment is regulated and include aspects of how we test properties of both the bats and baseballs. Topics will include aluminum versus wood bats, corked bats, bat durability, stiffness and mass distribution as it relates to baseball bats, and specifications of the major league baseball including the lack of the "juiced baseball."