2026 MLB Topps Series I Hobby Box

Topps has released its flagship baseball series every year since 1952, and the 2026 edition continues the tradition with a new base set design. Series I is followed during the year by Series 2 and Update, and together they form the year's complete flagship set. Rookie cards are marked with the official RC logo, so it is easy to see which players have their first real Topps cards in the series.

Topps Series I is the first part of Topps' flagship baseball series and the edition that opens the collecting season with a broad base set across the MLB teams. The series is known for its rookie cards, coloured parallel cards and the recurring insert series that collectors follow from year to year. The cards are in English and the box is factory sealed.

A sealed hobby box: the channel where the manufacturer's autograph and parallel cards are inserted, unlike the retail formats. The hobby format has the best hits in the programme.