Cooper Flagg 2025 Topps Now Dallas Mavericks NBA Debut Rookie Card #6 graded PSA 9 Mint highlights a key rookie-year debut moment for one of the most important modern basketball prospects. The Topps Now format gives this card event-based collector relevance documenting his NBA arrival with the Dallas Mavericks. PSA grading and certification number 149393639 provide authentication and condition confidence making this a strong collectible for Mavericks fans rookie card buyers and collectors following Flagg's career trajectory.