Show up in classic game day style with a new Under Armour Arizona Diamondbacks shirt from our shop at Lids.com. Our assortment of Diamondbacks shirts come in a variety of styles and sizes that all show off official Diamondbacks colors and graphics. From casual Arizona Diamondbacks short-sleeve tees to long-sleeve shirts, we got you covered for any time of the season. For those hot game days, snag a comfortable Under ArmourDiamondbacks tank top. Be sure to check back for new arrivals of Arizona Diamondbacks t-shirts so you're ready for every event throughout the season.