2026 Topps Update Series MLB Baseball Blaster Box. Celebrate 75 years of Topps Baseball with 2026 Update Series. 2026 Update Series rounds out the year-long celebration of the 75th Anniversary of Topps Baseball, honoring the most iconic name in trading cards. Update Series delivers a 350-card Base Set featuring today’s biggest MLB stars, top rookies, and Future Stars. As the final Flagship release of the year, the checklist captures in-season call-ups, players in new uniforms following trades, and memorable moments from across the season. Fan-favorite designs such as All Aces, Heavy Lumber, and Home Field return, while additions introduced throughout Series 1 and Series 2 – including Base Card 1952 Variations and 1991 Topps Baseball – continue in Update Series. 6 Packs Per Box, 12 Cards Per Pack, 72 Cards Per Box. New/Factory Sealed