Find officially licensed Arizona Diamondbacks Under Armour shirts from Fanatics featuring official team graphics available in a variety of styles for every fan. Grab a new Under Armour Diamondbacks player name and number t-shirt so you can display your team pride and support for your favorite player at the next game in a style you love. Shop Diamondbacks tank tops, long-sleeve shirts and short-sleeve tees so you're ready for every game throughout the season. Fanatics.com has the best Diamondbacks t-shirts, including throwback Arizona Diamondbacks shirts so you can watch the game in a vintage look. Browse the best brands and find the perfect Diamondbacks shirt for your game day wardrobe. Fanatics is your one-stop shop for all the Under Armour Arizona Diamondbacks apparel you need to showcase your style and team spirit wherever you go.