Huge inventory of authentic autographed sports and entertainment memorabilia and collectibles. Autographed Nike Baseball Jersey Atlanta Braves Beckett 181962. Offered is a Ronald Acuna Jr. Autographed Gray Nike Baseball Jersey Atlanta Braves. This jersey is authenticated by BAS/Beckett and includes their Tamper-proof Sticker. Questions about this item? We welcome any questions, concerns, or queries you may have. Best Authentics is a leading sports memorabilia and collectibles retailer located in South Central Pennsylvania. We have specialized in supplying quality authentic products to collectors for over 20 years and continue to update our inventory frequently with new and exciting items.