2025-26 Upper Deck NHL Series 1 Hockey Cards RETAIL - Series 1 sports the first 250 cards of the 2025-26 Upper Deck Base Set. Annually, the Upper Deck Base Set is the most widely-collected Base Set in hockey. The set includes (198) Veteran Cards, (49) Young Guns rookie cards and three checklist cards. The iconic Young Guns are the most anticipated rookie cards of the season and the Series 1 checklist is LOADED with high-end rookies!