2026 Topps Series 1 Celebration Mega 20-Box Case

Release date: March 26, 2026

Configuration:

• 14 cards per pack.
• 14 packs per box.

The 2026 Topps Series 1 Baseball Celebration Mega Box arrives just in time for MLB® Opening Day, building on the flagship release while continuing the celebration of 75 Years of Topps Baseball.

Featuring the full 350-card Series 1 base set, Celebration showcases today’s biggest stars, top rookies, Future Stars, League Leaders, and team cards. Collectors can also chase special 75th anniversary-themed inserts and parallels that pay tribute to Topps’ rich history and lasting legacy in the hobby.

The Celebration Mega Box includes exclusive base card parallels and inserts. Fan-favorite sets return, including Dugout Peeks, Walk This Way, and Gameday Drip, along with cards spotlighting team mascots.

Autographs and relics remain at the heart of the product, delivering the exciting hits collectors have come to expect from Topps Baseball.