The 2025 Topps Update Series Home Field Advantage Marcelo Mayer #HA-47 (RC) BOS trading card is a standard-sized baseball card featuring rookie player Marcelo Mayer from the Boston Red Sox. This card is part of the 2025 Topps Update Series set and is signed by Mayer in a hard-signed format. Produced by Topps, the card is made of 20 Pt. card stock and is an original insert in the Home Field Advantage collection. It is a valuable addition for fans and collectors of Major League Baseball memorabilia. Any visible lines on the images are due to the hi-res scanner and are not on the actual card.