This 2024 Topps Series 1 sports trading card features an autographed throwback parallel variety of Mark McGwire, signed by the baseball legend himself. The card is numbered 89BA-MMC and manufactured by Topps, with authentication from the same company. It is a standard size card, perfect for any Major League (MLB) fan or collector. The card is part of the 2024 Topps Series 1 set and features an insert design. It is perfect for anyone who loves baseball and is looking to add a unique and authentic piece to their collection. The card is signed in hard format and comes with a throwback parallel variety, making it a great addition to any sports trading card collection.