Personalized Baseball Irish Shamrock Toddler T-Shirt. A green baseball with the imprint of a shamrock is a unique Irish themed gift design for baseball players and fans on birthdays and St. Patrick's Day. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.