Baseball Eye Black
It's typical to see baseball players with two black smudges or lines underneath their eyes during games or practice. This is eye black and is used to keep the sun and glare out of a player's eyes. Baseball season is typically from early spring to mid-fall, meaning players are often playing in direct sunlight, so they need all the help they can get to be able to see. Some players use stickers and some smudge grease on their face. It's not a required piece of equipment, but it can be helpful on a sunny day. It also is apart of the traditional baseball look and can be a cool addition to the uniform.