Let your four legged friend show their baseball pride with Seattle Mariners pet gear. Choose the perfect item of merchandise that we have available for your furry friend. Snag Mariners dog jerseys, dog bowls, leashes and more. Let your pet enjoy being comfortable while cheering on the team with you. Even after the game is over your dog can continue to support the team with the Mariners dog collars. You and your pet can have and enjoy all of the official fan apparel together. Check out all of the Seattle Mariners fan gear here at the MLB Shop.