The 2026 Topps Baseball Series 1 Base RC's are trading card singles featuring rookie players from the 2026 season. Manufactured by Topps, these sports trading cards are part of the baseball set for that year. With a variety of base cards to choose from, collectors can complete their set by picking singles from this series. Perfect for baseball fans looking to add rookie cards to their collection, these trading cards are a must-have for any enthusiast of the sport.