When you celebrate with your dad this June 17th, be sure to make sure you do it with a little MLB style and pick out an official Seattle Mariners Father's Day Gift from Fanatics. Along with a wide variety of Mariners Jerseys that make great gifts for baseball fans, we're stocked with authentic Mariners Fathers Day Shirts and Hats. Browse our Mariners Fathers Day hats for exclusive designs or pick out a classic Mariners #1 Dad Tee from our shop. Fanatics.com offers a large assortment of Seattle Mariners Father's Day Gear including Apparel as well as Accessories like Belts, Ties and more traditional Father's Day fare. Make Dad's day this year with high-quality Mariners Father's Day Gifts from Fanatics.