Stay warm and stylish with a new Big & Tall A's sweater or dress shirt from MLB Shop. Browse our great selection of Oakland Athletics Big & Tall shirts and sweaters to add to your wardrobe. From classic A's button-up shirts to festive A's ugly sweaters, we have just the right look for you. Check out our A's Hawaiian shirts for a fun twist on team-inspired fashion. Enjoy cheering on your team wherever your go with our Big & Tall Oakland Athletics zip-up sweaters, long sleeve button-ups, cardigans and more. Whether you're looking for something to stay warm in the colder months or for something to wear at the office, MLB Shop is your one-stop shop.