The 2025 Topps Cosmic Chrome Marcelo Mayer Extraterrestrial Talent Rookie Card #ET-35 featuring the Red Sox player is a highly sought-after sports trading card. Produced by Topps, this card is part of the 2025 Topps set and showcases Marcelo Mayer's rookie talent. The card is a special Chrome variety with extraterrestrial-themed features, making it a unique and valuable addition to any baseball card collection.