The Marcelo Mayer 2025 Topps Cosmic Chrome Planetary Pursuit Mercury PSA 9 trading card is an original English-language sports trading card featuring the baseball player Marcelo Mayer from the Boston Red Sox. This card, part of the 2025 Topps Cosmic Chrome set, showcases Mayer as part of the Planetary Pursuit insert set, with the specific variant being the Planetary Pursuit Mercury parallel. Graded by Professional Sports Authenticator (PSA), this card is a short print rookie card made of card stock and is a sought-after collector's item for fans of Major League Baseball.