The 2025 Topps Update Series - 35th Anniversary Baseball Marcelo Mayer #U90-9 Green trading card is a limited edition collectible featuring the player Marcelo Mayer from the Boston Red Sox. Manufactured by Topps, this card is part of the 1990 Topps Baseball insert set and is serial numbered with a print run of 99. Made of sturdy card stock material, this sports trading card is a valuable addition for fans and collectors of Major League Baseball memorabilia.