Huge inventory of authentic autographed sports and entertainment memorabilia and collectibles. Signed Braves Cream Majestic Baseball Jersey 48 JSA 164318. Offered is a Ronald Acuna Jr. Signed/Autographed Atlanta Braves Cream Majestic Baseball Jersey Size 48. This jersey is authenticated by JSA and includes their Tamper-proof Hologram 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.