The 2026 Topps Series 1 Celebration Mascot 20 Card Lot is a collection of standard-sized baseball trading cards featuring mascots from Major League Baseball teams like the Boston Red Sox, Los Angeles Dodgers, and Pittsburgh Pirates. Manufactured by Topps in 2026, these original cards are made of card stock and come with an autograph authentication by Topps. Each card is an insert from the set and showcases unique designs celebrating the various MLB teams and their mascots, making it a must-have for fans and collectors of sports trading cards.