Wood in Louisville Sluggers refers to the type of wood used to make the iconic baseball bats. The answer to the crossword is 'ASH', which is a type of hardwood that is strong and durable, making it an ideal material for baseball bats. Louisville Slugger is a brand of baseball bats that have been used by professional players since 1884. The company has been using ASH wood to make their bats since the beginning, making them one of the most popular brands of baseball bats in the world.