Baseball is the only sport where the opponent is wearing a flexible head covering. Some people call these caps, other hats, but regardless they are highly scrutinized.
Baseball hats give normal citizens the opportunity to look the part without ever touching a baseball and has become a multi billion dollar industry now that all sports teams want their logo on a cap.
Because appearance is one of the number one qualities that the United States considers when talking sports, MLB players change their hats throughout preparing for a game day.
Every four years or so Major League changes the batting practice hat design.
Check out what the Detroit Tigers will be wearing this season while they are taking batting practice.