Represent your favorite player with the best selection of officially licensed Grant Williams uniforms and oufits from CelticsFanShop. You can proudly show your support with an authentic Grant Williams Celtics Jersey that displays their name and number on the back combined with official team colors and logo. Go with a casual look at the next game with a stylish Grant Williams Boston Celtics hoodie or t-shirt. Celebrate their success and add to your collection with official Grant Williams Celtics memorabilia, such as signed collectibles.