Your source for the best Kids Seattle Mariners sweatshirts and hoodies is the MLB Shop. Choose from official Kids Mariners pullovers, retro zip ups, Mariners sweaters, fleeces, and much more. An official and comfortable Mariners Kids sweatshirt or hoodie makes the perfect addition to your gameday look. Show your Mariners love in any season with warm and comfortable gear from brands like Nike, '47, and more. Fill your wardrobe or find awesome Seattle Mariners gifts and clothing for your loved ones. The place to find all the best Mariners Kids hoodies and sweatshirts is the MLB Shop.