The 2026 Topps Series 1 Baseball trading card set includes base singles #251-350 featuring top players like Bryce Harper, Shohei Ohtani, and Mookie Betts. Manufactured by Topps in the United States, these standard-sized cards are made of card stock and paper materials. Part of the MLB World Series event/tournament, these English-language cards are part of the original licensed reprint set. Complete your collection with these authentic baseball trading cards from the 2026 season.