Each Box contains 1 Base Card Opening Day Parallel and at least 7 Base Card Confetti Parallels, on average!

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

Celebration delivers the 350-card Series 1 base set, featuring today's biggest stars, top rookies, Future Stars, League Leaders, and team cards. Collectors can look for 75th anniversary-themed inserts and parallels that honor the brand's rich history and legacy in the Hobby.

The Celebration Mega Box adds exclusive base card parallels and inserts. Returning favorites include Dugout Peeks, Walk this Way, and Gameday Drip, alongside trading cards highlighting team mascots.

Autographs and relics remain a cornerstone of the experience, delivering the hits collectors expect from Topps Baseball.

Configuration : 14 Packs Per Box, 14 Cards Per Pack

Product Highlights

• 1 Base Card Opening Day Parallel Per Box!
• At Least 7 Base Card Confetti Parallels Per Box!
• Search For Autographs and Relics!
• Find 75th Anniverary Themed Inserts!
• Look For Exclusive Holo Foil Parallels!

Key Rookies

• Roman Anthony
• Jac Caglianone
• Samuel Basallo
• Cam Schlittler
• Jacob Misiorowski
• Bubba Chandler
• Nolan McLean
• Dylan Beavers
• Kyle Teel
• Colson Montgomery
• Chase Burns
• Carson Williams
• Jakob Marsee
• Payton Tolle
• Owen Caissie
• Jhostynxon Garcia
• Cole Young
• Jonah Tong
• Brady House
• Jacob Melton
• C.J. Kayfus
• Christian Moore
• Drew Gilbert
• Carlos Cortes
• Brice Matthews

• Manufacturer: Topps
• Product: Base Set
• Series: Series 1
• UPC/Barcode: 887521155071
• Release Date: March 26th, 2026

Specifications

• Configuration: 14 Packs Per Box, 14 Cards Per Pack
• Manufacturer: Base Set
• Product: 2026 Topps Series 1 Baseball Celebration Mega Box
• Year: 2026
• Category: Baseball Cards