2020 Topps Pro Debut Baseball sticks with being the flagship take on MiLB. It’s making a couple of significant changes. Th is year, hobby jumbo boxes are being added to go alongside the usual hobby boxes. Besides having one extra autograph, jumbo boxes are the only place to find the set’s other major addition — Topps Chrome parallels. Hobby boxes have a pair of autographs and two memorabilia cards or manufactured relics. Jumbo boxes deliver three autographs.
2020 TOPPS PRO DEBUT BASEBALL BASE SET BASICS