2026 Topps Series 1 Baseball Celebration Mega Box

The 2026 Topps Series 1 Baseball Celebration Mega Box arrives just in time for MLB Opening Day, continuing the excitement of the flagship release while honoring 75 Years of Topps Baseball. This special edition combines the full Series 1 checklist with exclusive content, making it a must-have for collectors kicking off the new season.

Featuring the 350-card Series 1 base set, collectors can find today’s biggest stars, top rookies, Future Stars, League Leaders, and team cards. Celebration Mega Boxes also highlight Topps’ rich history with 75th anniversary-themed inserts and parallels, adding a nostalgic touch to this modern release.

Exclusive to the Celebration Mega Box are special base card parallels and inserts, including returning fan favorites like Dugout Peeks, Walk This Way, and Gameday Drip, along with unique cards showcasing team mascots. Autographs and relics remain a key part of the experience, giving collectors the chance to pull exciting hits in every box.

What You Can Look For

• 350-card Series 1 base set featuring stars, rookies, and legends

• 75th Anniversary-themed inserts and parallels

• Exclusive Celebration Mega Box parallels and inserts

• Inserts like Dugout Peeks, Walk This Way, and Gameday Drip

• Autographs and relic cards

Box Break (on average)

• 1 Base Card Opening Day Parallel

• 7 or more Base Card Confetti Parallels

Box Configuration

• Packs per box: 14

• Cards per pack: 14

• Total cards per box: 196